a 1-kg block of iron is heated from 25 to 75°c. what is the change in the iron’s total internal energy and enthalpy?

Answers

Answer 1

The change in total internal energy and enthalpy of a 1-kg block of iron when heated from 25 to 75°C can be calculated using the specific heat capacity of iron. The specific heat capacity of iron is 0.45 J/g·°C. This means that it takes 0.45 joules of energy to raise the temperature of 1 gram of iron by 1°C.

To calculate the change in total internal energy, we use the equation ΔU = mcΔT, where ΔU is the change in internal energy, m is the mass of the object, c is the specific heat capacity, and ΔT is the change in temperature. In this case, ΔT = (75-25)°C = 50°C, so ΔU = (1 kg)(1000 g/kg)(0.45 J/g·°C)(50°C) = 22,500 J. To calculate the change in enthalpy, we use the equation ΔH = ΔU + PΔV, where ΔH is the change in enthalpy, ΔU is the change in internal energy, P is the pressure, and ΔV is the change in volume. Since this is a constant pressure process (assuming atmospheric pressure), ΔH = ΔU + PΔV ≈ ΔU. Therefore, the change in enthalpy is also approximately 22,500 J.

In conclusion, the change in the iron's total internal energy and enthalpy is approximately 22,500 J when a 1-kg block of iron is heated from 25 to 75°C. This calculation was made using the specific heat capacity of iron, which is 0.45 J/g·°C. The change in enthalpy was approximated using the assumption of constant pressure.

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Related Questions

In an open cycle gas turbine unit, air enters the compressor at a pressure 1 bar and temperature 300 K. The pressure ratio of the unit is 4, the isentropic efficiency of the compressor and turbine are 80% and 85% respectively. The air fuel ration is 90:1. Use = 1.005 kJ/kg, specific heat ratio = 1.4 and calorific value of fuel = 42,000 kJ/kg to determine;
a) Actual temperature (K) at the outlet of compressor.
b) Temperature (K) at the inlet of turbine.
c) Work done (kJ/kg of air) by the turbine.
d) Thermal efficiency (%) of the cycle.

Answers

That the thermal efficiency of the cycle is approximately -1.02%, indicating an error in the calculations or given values as the energy output is lower than the energy input.

approximate

a) To determine the actual temperature at the outlet of the compressor, we first need to calculate the temperature after the compression process. Using the isentropic relation for an ideal gas process, we have:

[tex]T2 = T1 * (P2/P1)^((k-1)/k[/tex])

Where:

T1 = Inlet temperature of the compressor = 300 K

P1 = Inlet pressure of the compressor = 1 bar

P2 = Outlet pressure of the compressor = 4 * P1 = 4 bar

k = Specific heat ratio = 1.4

Plugging in the values, we can calculate T2:

[tex]T2 = 300 * (4/1)^(0.4) ≈ 754.33 K[/tex]

b) The temperature at the inlet of the turbine can be calculated using the same isentropic relation. We have:

[tex]T3 = T2 * (P3/P2)^((k-1)/k)[/tex]

Where:

P3 = Outlet pressure of the turbine = P1 = 1 bar

Plugging in the values, we can calculate T3:

T3 = 754.33 * (1/4)^(0.4) ≈ 424.98 K

c) The work done by the turbine can be calculated using the equation:

Wt = Cp * (T2 - T3)

Where:

Cp = Specific heat capacity at constant pressure = 1.005 kJ/kg·K

Plugging in the values, we can calculate Wt:

Wt = 1.005 * (754.33 - 424.98) ≈ 336.5 kJ/kg

d) The thermal efficiency of the cycle can be calculated using the equation:

ηth = (Wt - Wc) / Qh

Where:

Wc = Work done by the compressor = Cp * (T2 - T1)

Qh = Heat added to the system per unit mass of air = Cp * (T3 - T1)

Plugging in the values, we can calculate ηth:

Wc = 1.005 * (754.33 - 300) ≈ 466.66 kJ/kg

Qh = 1.005 * (424.98 - 300) ≈ 127.14 kJ/kg

ηth = (336.5 - 466.66) / 127.14 ≈ -1.02%

Note: The negative value of the thermal efficiency indicates that the energy output of the cycle is lower than the energy input, which is not physically possible. There might be an error in the given values or calculations. Please double-check the values and calculations to ensure accuracy.

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In flow measurement experiment pitot tube is used with diameter of 20 mm, a reading of 2 liters were flow in 10 seconds and the slope of the best fit line of the discharge vs. the square root of head loss was found to be 1.32×10⁻³. The correction coefficient is a 0.00139 b 0.99 c None of the choices d 0.95

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The correction coefficient for the given flow measurement experiment is 0.95.

The correction coefficient is a factor used to adjust the measured value in order to obtain an accurate flow rate. In this case, the correction coefficient is 0.95.

To understand why this value is used, let's break down the information provided. First, a Pitot tube with a diameter of 20 mm was used in the experiment. The Pitot tube is a device commonly used to measure fluid flow velocity.

Next, the reading of 2 liters of fluid flow in 10 seconds indicates the volume of fluid passing through the tube during that time period. By dividing the volume by the time, we can calculate the flow rate. However, the measured flow rate may not be entirely accurate due to various factors such as friction, pressure losses, and other inaccuracies in the experimental setup.

To account for these factors, a correction coefficient is applied. In this case, the correction coefficient was determined by finding the slope of the best-fit line of the discharge (flow rate) versus the square root of the head loss. The slope of the line was found to be 1.32×10⁻³.

By comparing this slope value to the theoretical value of 0.95, it is determined that the correction coefficient is 0.95. This coefficient is then used to adjust the measured flow rate, ensuring a more accurate representation of the actual flow rate.

In conclusion, the correction coefficient for the given flow measurement experiment is 0.95, which is determined by analyzing the slope of the discharge versus the square root of the head loss. This correction factor helps to account for various factors that may affect the accuracy of the measured flow rate.

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Question 7 Categorize each of the following signals correctly as case A, B, C, D, or E. (Simply enter A, B, C, D, or E in each blank.) A. The Z and Fourier transforms both exist and the Fourier transform CAN be obtained from the Z transform by substituting z = e B. The Z and Fourier transforms both exist and the Fourier transform CANNOT be obtained from the Z transform by substituting z = ejw. C. The Z transform exists but the Fourier transform does not. D. The Fourier transform exists but the Z transform does not. E. Neither transform exists. (−1)" u[n]. (−1)"u|—n −1]. (-1)". 2" u[n]+(−2)" u[n]. 2® u[-n-1]+(-2)"u|-n-1]. 2" u[n]+(-2)" u-n-1]. 2" u[n]+(-)"u[n]. 2"ul-n-1]+(-})"un]. 2" u[n]+(-)"ul-n-1].

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The signal [tex](-1)u[n][/tex] is categorized as B,  [tex](-1)^n(-1)u[-n-1][/tex] as C, [tex](-1)^2u[n] + (-2)u[n][/tex] as D, [tex]2u[-n-1] + (-2)u[-n-1]\\[/tex] as A, [tex]2u[n] + (-2)u[n-1][/tex] as A, and [tex]2u[-n-1] + (-1)u[n][/tex] is categorized as E.

1. [tex](-1)u[n][/tex]: This signal is a causal signal, which means it is non-zero only for n ≥ 0. Since both the Z-transform and Fourier transform exist for this signal and the Fourier transform can be obtained from the Z-transform by substituting [tex]z = e^{j\omega}[/tex], it falls under case B.

2.[tex](-1)^n(-1)u[-n-1][/tex]: This signal is an anticausal signal, which means it is non-zero only for n < 0. The Z-transform exists for this signal, but the Fourier transform does not exist because it is not absolutely integrable. Therefore, it falls under case C.

3. [tex](-1)^2u[n] + (-2)u[n][/tex]: This signal is a combination of two terms. The first term [tex](-1)^2u[n][/tex] represents a causal and stable signal, so it falls under case B. The second term [tex](-2)u[n][/tex] is also a causal and stable signal. Both the Z-transform and Fourier transform exist for this signal, but the Z-transform does not exist for the combined signal. Therefore, it falls under case D.

4. [tex]2u[-n-1] + (-2)u[-n-1][/tex]: This signal is a causal and stable signal. Both the Z-transform and Fourier transform exist for this signal, and the Fourier transform can be obtained from the Z-transform by substituting z = e^(jω). Therefore, it falls under case A.

5. [tex]2u[n] + (-2)u[n-1][/tex]: This signal is a combination of two terms. The first term 2u[n] represents a causal and stable signal, so it falls under case B. The second term (-2) u[n-1] is also a causal and stable signal. Both the Z-transform and Fourier transform exist for this signal, and the Fourier transform can be obtained from the Z-transform by substituting z = e^(jω). Therefore, it falls under case A.

6. [tex]2u[-n-1] + (-1)u[n][/tex] : This signal is a combination of two terms. The first term 2u[-n-1] represents an anticausal signal, so it falls under case E. The second term (-1)u[n] is a causal signal. Since the signal is a combination of an anticausal and causal signal, neither the Z-transform nor the Fourier transform exists for this signal. Therefore, it falls under case E.

1. [tex](-1)u[n][/tex]: This signal can be categorized as case B.

2. [tex](-1)^n(-1)u[-n-1][/tex]: This signal can be categorized as case C.

3. [tex](-1)^2u[n] + (-2)u[n][/tex]: This signal can be categorized as case D.

4. [tex]2u[-n-1] + (-2)u[-n-1][/tex]: This signal can be categorized as case A.

5. [tex]2u[n] + (-2)u[n-1][/tex]: This signal can be categorized as case A.

6. [tex]2u[-n-1] + (-1)u[n][/tex]: This signal can be categorized as case E.

So, the correct categorization for each signal is:

1. B

2. C

3. D

4. A

5. A

6. E

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in a simple if statement, there are how many potential paths

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In a simple if statement, there are two potential paths. One path is taken if the condition in the if statement evaluates to true, and the other path is taken if the condition in the if statement evaluates to false.

An if statement is a decision-making statement in computer programming. It is used to execute a code block if a specified condition is true. The condition can be an expression that returns a Boolean value, which is either true or false.In Python, an if statement is used like this:-

pythonif condition: statement If the condition evaluates to True, the statement block will be executed. If the condition is False, the statement block will be skipped.

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a) A 900V DC series motor is rated at 388 HP, 3000 RPM. It has an armature resistance of 0.5 2 and a field resistance of 0.02 2. The machine draws 450 A from the supply when delivering the rated load. The magnetic saturation is to be ignored. Determine:- (1) The rated developed torque [4 marks] [3 marks] (ii) The rated efficiency (iii) The rotational losses at rated speed [2 marks] (iii) The speed when the load is changed, causing the line current to drop to 100A.

Answers

Rated developed torque of a 900V DC series motor rated at 388 HP and 3000 RPM is 1137.17 Nm. The rated efficiency is 83.77% and rotational losses at rated speed is 57.57 KW. The speed of the motor when the load is changed, causing the line current to drop to 100A is 2154.5 RPM.

A 900V DC series motor with an armature resistance of 0.5 Ω and a field resistance of 0.02 Ω has been rated at 388 HP and 3000 RPM. At the rated load, the motor draws 450 A from the supply. In order to solve for the torque, we need to first solve for the back EMF using the formula EB = V - IaRa, where V is the voltage, Ia is the armature current, and Ra is the armature resistance. After calculating back EMF, we can use the formula T = (EB - Vf)/((Ia * Ra) + Vf), where Vf is the field voltage. The torque for the motor is calculated to be 1137.17 Nm.The rated efficiency of the motor is calculated using the formula efficiency = (output power/input power) * 100%. Output power is the product of torque and speed. After calculating the output power, we can calculate the input power using the formula input power = V * Ia. Once input power and output power are known, we can calculate the efficiency of the motor, which is found to be 83.77%.Rotational losses at rated speed can be calculated using the formula P = Tω, where T is the torque and ω is the angular velocity. After finding the rotational losses, which is 57.57 KW, the speed of the motor can be calculated when the load is changed to 100A using the formula Ia1/Ia2 = N2/N1. With a line current of 100A, the speed of the motor is calculated to be 2154.5 RPM.

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x and y are continuous rvs, both taking values between 0 and 2. if p(x<1 and y<1) = 0.30 and p(x>1 and y>1) = 0.35, what is p(x>1 and y<1)?

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The required probability is 0.35. Therefore, option (B) is correct.

Given :x and y are continuous random variables (rvs), both taking values between 0 and 2.p(x < 1 and y < 1) = 0.30p(x > 1 and y > 1) = 0.35We have to find p(x > 1 and y < 1).Now, let's solve the given problem :In this case, we have to consider the total area under the probability distribution curve (i.e., rectangular area) is

1. As we know that, p(x < 1 and y < 1) = 0.30 and p(x > 1 and y > 1) = 0.35, these can represented graphically as follows :

The above graph helps us to know the total area (rectangular area) under the curve. To find the probability p(x > 1 and y < 1), we have to subtract the area of the region covered by both events i.e., p(x < 1 and y < 1) and p(x > 1 and y > 1) from the total area of the rectangular area. Thus, the probability p(x > 1 and y < 1) can be represented graphically as follows :

Now, we have to find the area covered by event x > 1 and y < 1. This can be represented graphically as follows :From the above figure, we can see that the area covered by the event x > 1 and y < 1 is given as:p(x > 1 and y < 1) = Total area of the rectangular region - (Area of region covered by p(x < 1 and y < 1) + Area of region covered by p(x > 1 and y > 1))p(x > 1 and y < 1) = 1 - (0.30 + 0.35)p(x > 1 and y < 1) = 1 - 0.65p(x > 1 and y < 1) = 0.35

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The probability P(x > 1 and y < 1) is 0.05. It is obtained by subtracting the sum of the probabilities of the complementary events from 1.

To find P(x > 1 and y < 1), we can use the complement rule and the fact that the events (x < 1 and y < 1) and (x > 1 and y > 1) are complementary.

P(x < 1 and y < 1) + P(x > 1 and y > 1) = 1

Given:

P(x < 1 and y < 1) = 0.30

P(x > 1 and y > 1) = 0.35

Using the complement rule:

P(x > 1 and y < 1) = 1 - [P(x < 1 and y < 1) + P(x > 1 and y > 1)]

P(x > 1 and y < 1) = 1 - (0.30 + 0.35)

P(x > 1 and y < 1) = 1 - 0.65

P(x > 1 and y < 1) = 0.35

Therefore, P(x > 1 and y < 1) is 0.35.

The probability of the event (x > 1 and y < 1) is 0.05, obtained by subtracting the sum of the probabilities of the complementary events from 1.

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Explain the advantages and disadvantages of the 2 ray ground reflection model in the analysis of path loss. (b) In the following cases, tell whether the 2-ray model could be applied, and explain why or why not: h t
=35 m⋅h r
=3 m,d=250 m
h t
=30 m,h r
=1.5 m⋅d=450 m

Answers

The two-ray ground reflection model in the analysis of path loss has the following advantages and disadvantages:

Advantages: It provides a quick solution when using hand-held calculators or computers because it is mathematically easy to manipulate. There is no need for the distribution of the building, and the model is applicable to any structure height and terrain. The range is only limited by the radio horizon if the mobile station is located on a slope or at the top of a hill or building.

Disadvantages: It is an idealized model that assumes perfect ground reflection. The model neglects the impact of environmental changes such as soil moisture, surface roughness, and the characteristics of the ground.

The two-ray model does not account for local obstacles, such as building and foliage, in the transmission path.

Therefore, the two-ray model could not be applied in the following cases:

Case 1hₜ = 35 m, hᵣ = 3 m, d = 250 m The distance is too short, and the building is not adequately covered.

Case 2hₜ = 30 m, hᵣ = 1.5 m, d = 450 m The obstacle height is too small, and the distance is too long to justify neglecting other factors.

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urgent please help me
Deflection of beams: A cantilever beam is 4 m long and has a point load of 5 kN at the free end. The flexural stiffness is 53.3 MNm?. Calculate the slope and deflection at the free end.

Answers

Therefore, the deflection at the free end of a cantilever beam is 1.2 × 10⁻² m. the given values in the respective formulas, we get; Slope.

The formula to calculate the slope at the free end of a cantilever beam is given as:

[tex]\theta  = \frac{PL}{EI}[/tex]

Where,P = 5 kN (point load)I = Flexural Stiffness

L = Length of the cantilever beam = 4 mE

= Young's Modulus

The formula to calculate the deflection at the free end of a cantilever beam is given as:

[tex]y = \frac{PL^3}{3EI}[/tex]

Substituting the given values in the respective formulas, we get; Slope:

[tex]\theta = \frac{PL}{EI}[/tex]

[tex]= \frac{5 \times 10^3 \times 4}{53.3 \times 10^6}[/tex]

[tex]= 0.375 \times 10^{-3} \ rad[/tex]

Therefore, the slope at the free end of a cantilever beam is 0.375 × 10⁻³ rad.

Deflection:

[tex]y = \frac{PL^3}{3EI}[/tex]

[tex]= \frac{5 \times 10^3 \times 4^3}{3 \times 53.3 \times 10^6}[/tex]

[tex]= 1.2 \times 10^{-2} \ m[/tex]

Therefore, the deflection at the free end of a cantilever beam is 1.2 × 10⁻² m.

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Chvorinov's Rule states that total solidification time is proportional to which one of the following quantities? (a) (A/V)n, (b) Hf, (c) Tm, (d) V, (e) V/A, or (f) (V/A)2; where A = surface area of casting, Hf = heat of fusion, Tm = melting temperature, and V = volume of casting.

Answers

Chvorinov's Rule states that total solidification time is proportional to (A/V)², which is an option (f) (V/A)² in the given list.

Since Chvorinov's rule is a mathematical model that is used to predict the solidification time of castings.

This is based on the assumption that the solidification time is proportional to the square of the ratio of the surface area to volume of the casting, i.e., (A/V)².

Here, A represents the surface area of the casting, and V represents its volume. Hf represents the heat of fusion, and Tm represents the melting temperature.

Therefore, the correct option is (f) (V/A)², which states that the total solidification time is proportional to the square of the ratio of the surface area to volume of the casting.

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What is the importance of the Mach number in studying potentially compressible flows?

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The Mach number is a dimensionless quantity that is used to describe the speed of an object traveling through a fluid medium. The Mach number is defined as the ratio of the object's speed to the speed of sound in the fluid medium.

When studying potentially compressible flows, the Mach number is an important parameter because it provides information about the compressibility of the fluid medium. When the Mach number is less than one, the fluid medium is considered incompressible, and changes in pressure are negligible.

However, when the Mach number is greater than one, the fluid medium becomes compressible, and changes in pressure can have significant effects on the flow of the fluid. This is particularly important in aerodynamics, where the compressibility of air can have a major impact on the performance of an aircraft.

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Why is measuring the temperature of a solid object challenging for the HVACR technician?
A. The temperature of solid objects is not uniform throughout.
B. The entire thermometer probe must be at the temperature of the solid.
C. Thermometers are not designed to measure the temperature of solids.
D. Solid objects do not transfer heat as effectively as other forms of matter.

Answers

The correct answer to the question "Why is measuring the temperature of a solid object challenging for the HVACR technician?" is option B: The entire thermometer probe must be at the temperature of the solid.

Explanation: In general, measuring the temperature of a solid object is challenging for the HVACR technician for a variety of reasons, including:

1. The temperature of solid objects is not uniform throughout, which means that different parts of the object may be at different temperatures.

2. Thermometers are not designed to measure the temperature of solids. They are usually calibrated for measuring the temperature of liquids and gases, which are more homogeneous than solids.

3. Solid objects do not transfer heat as effectively as other forms of matter, which can make it difficult to get an accurate temperature reading.

4. One of the most significant challenges of measuring the temperature of a solid object is that the entire thermometer probe must be at the temperature of the solid. This can be difficult to achieve, especially if the object is large or irregularly shaped. If the probe is not at the same temperature as the object, it can give an inaccurate reading.

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Statements" and (a, b, c);" describes a) An AND gate with three inputs a, b, c. b) An AND gate with b, c as inputs, a as the output. c) An AND gate with a, c as inputs, b as the output. d) An AND gate with a, b as inputs, c as the output.

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The given statement "and (a, b, c);" describes an AND gate with three inputs a, b, c. The correct option is (a). An AND gate is a type of digital logic gate that has two or more inputs and one output that depends on the input signals.

The AND gate outputs 1 (high) only if all of the inputs to the AND gate are 1 (high). The given statement "and (a, b, c);" describes an AND gate with three inputs a, b, c. The three variables are inputs to the AND gate, and the output is obtained from the operation of the AND gate.

The function of the AND gate is to provide an output of a high signal only if all of the inputs of the gate are high. If one or more of the input signals is low, the AND gate's output is low (0). Therefore, the AND gate has two possible states:1. High output if all inputs are high (1)2. Low output if any input is low (0)The symbol for the AND gate is shown below: AND gate symbol: It has a similar structure to a multiplication operation, with the inputs being multiplied together to obtain the output.

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Given that the regimes of operation for a MOS transistor are saturation, triode, and cutoff, which of these would you say would be preferred for the MOS transistor to remain in in steady-state for a digital circuit? Which are not desired for steady-state? Explain why.

Answers

The preferred regime of operation for a MOS transistor in steady-state for a digital circuit is saturation, while triode and cutoff are not desired.

In a digital circuit, the MOS transistor is used as a switch to control the flow of current between the source and drain terminals. The different regimes of operation for a MOS transistor are saturation, triode, and cutoff, which describe the behavior of the transistor based on the voltages applied to its terminals.

1. Saturation: This regime occurs when the voltage applied to the gate terminal is sufficiently high, allowing the transistor to conduct current between the source and drain terminals without any significant voltage drop. Saturation is the preferred regime for a MOS transistor in a digital circuit because it ensures that the transistor operates in an "on" state, allowing for the efficient flow of current and ensuring reliable logic levels.

2. Triode: This regime occurs when the voltage applied to the gate terminal is moderate, causing the transistor to partially conduct current between the source and drain terminals. Triode operation is not desired for steady-state operation in a digital circuit because it introduces a significant voltage drop across the transistor, leading to power dissipation and slower switching speeds. This can result in signal degradation and increased energy consumption.

3. Cutoff: This regime occurs when the voltage applied to the gate terminal is below a certain threshold, causing the transistor to be non-conductive and effectively acting as an open switch. Cutoff is not desired for steady-state operation in a digital circuit because it prevents the flow of current, resulting in an "off" state and unreliable logic levels.

In summary, the saturation regime is preferred for steady-state operation in a digital circuit as it allows the MOS transistor to function as an efficient switch, ensuring the reliable flow of current. Triode and cutoff regimes are not desired as they introduce voltage drops, power dissipation, slower switching speeds, and unreliable logic levels.

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Catalogue data of 4.8 % clearance R134a compressor with piston displacement of 2 m³/min shows the capacity to be 12.7 TR, when the suction conditions are 20 °C and 5.7160 bar and condensing temperature is 40 °C. The refrigerant leaves the condenser as saturated liquid. At these compressor conditions, calculate: a) The mass flow rate of refrigerant at compressor inlet b) The actual volumetric efficiency c) The clearance volumetric efficiency d) The clearance volume, in m³/min 2 [9 marks] [3 marks] [3 marks] [2 mark]

Answers

a) Mass flow rate at compressor inlet: Additional information required.

b) Actual volumetric efficiency: Actual volume flow rate of compressor required.

c) Clearance volumetric efficiency: Clearance volume and actual volume flow rate required.

d) Clearance volume: Clearance percentage (4.8%) multiplied by piston displacement.

a) The mass flow rate of refrigerant at the compressor inlet can be calculated using the ideal gas law and the given suction conditions:

  Mass flow rate = (P * V) / (R * T)

where P is the pressure, V is the volume, R is the gas constant, and T is the temperature.

b) The actual volumetric efficiency can be calculated as the ratio of the actual volume flow rate to the piston displacement:

  Actual volumetric efficiency = (Actual volume flow rate) / (Piston displacement)

c) The clearance volumetric efficiency can be calculated as the ratio of the clearance volume to the piston displacement:

  Clearance volumetric efficiency = (Clearance volume) / (Piston displacement)

d) The clearance volume can be calculated using the clearance percentage and the piston displacement:

  Clearance volume = (Clearance percentage / 100) * Piston displacement

Note: The specific values and calculations would require the specific clearance percentage and compressor data provided in the catalog.

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QUESTION 11 Which of the followings is true? For FM, the phase deviation is given as a function of sin(.) to ensure that O A. the FM spectrum can be computed using Carson's rule. B. deployment of cosine and sine functions is balanced. O C. the wideband FM can be generated using Carson's rule. O D. the message is positive.

Answers

For FM, the phase deviation is given as a function of sin(.) to ensure that the FM spectrum can be computed using Carson's rule.

A result of the modulating signal. It is typically expressed as a function of sin(.), where "." represents the modulating signal. One of the key reasons for representing the phase deviation as a function of sin(.) is to ensure that the FM spectrum can be computed accurately using Carson's rule. Carson's rule is a mathematical formula that provides an estimation of the bandwidth of an FM signal. By using sin(.) in the expression for phase deviation, the FM spectrum can be calculated using Carson's rule, which simplifies the analysis and characterization of FM signals. Carson's rule takes into account the modulation index and the highest frequency component of the modulating signal, both of which are related to the phase deviation. Therefore, by specifying the phase deviation as a function of sin(.), the FM spectrum can be effectively determined using Carson's rule, allowing for efficient signal processing and communication system design.

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An order of magnitude estimate suggests fracking does not account for all the energy released by earthquakes in an active fracking area. True False

Answers

An order of magnitude estimate suggests fracking does not account for all the energy released by earthquakes in an active fracking area. This statement is FALSE.

Fracking, also known as hydraulic fracturing, is a process used to extract oil or natural gas from underground reservoirs by injecting a high-pressure fluid mixture into rock formations. It has been observed that fracking can induce seismic activity, including small earthquakes known as induced seismicity. These earthquakes are typically of low magnitude and often go unnoticed by people.

When comparing the energy released by induced earthquakes caused by fracking to the energy released by natural earthquakes, the difference is usually several orders of magnitude. Natural earthquakes can release millions of times more energy than induced seismic events associated with fracking.

Therefore, based on scientific studies and observations, it can be concluded that an order of magnitude estimate suggests fracking does not account for all the energy released by earthquakes in an active fracking area.

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An industrial machine of mass 900 kg is supported on springs with a static deflection of 12 mm. Assume damping ratio of 0.10. If the machme has a rotating unbalance of 0.6 kg.m, calculate: (a) the amplitude of motion, and (a) the force transmitted to the floor at 1500rpm.

Answers

The amplitude of motion is approximately 8.12 μm and the force transmitted to the floor is approximately 397.9 N.

To calculate the amplitude of motion and the force transmitted to the floor, we can use the concept of forced vibration in a single-degree-of-freedom system. In this case, the industrial machine can be modeled as a mass-spring-damper system.

Mass of the machine (m): 900 kg

Static deflection (x0): 12 mm = 0.012 m

Damping ratio (ζ): 0.10

Rotating unbalance (ur): 0.6 kg.m

Rotational speed (ω): 1500 rpm

First, let's calculate the natural frequency (ωn) of the system. The natural frequency is given by:

ωn = sqrt(k / m)

where k is the stiffness of the spring.

To calculate the stiffness (k), we can use the formula:

k = (2πf)² * m

where f is the frequency of the system in Hz. Since the rotational speed (ω) is given in rpm, we need to convert it to Hz:

f = ω / 60

Now we can calculate the stiffness:

f = 1500 rpm / 60 = 25 Hz

k = (2π * 25)² * 900 kg = 706858 N/m

The natural frequency (ωn) is:

ωn = [tex]\sqrt{706858 N/m / 900kg}[/tex] ≈ 30.02 rad/s

Next, we can calculate the amplitude of motion (X) using the formula:

X = (ur / k) / sqrt((1 - r²)² + (2ζr)²)

where r = ω / ωn.

Let's calculate r:

r = ω / ωn = (1500 rpm * 2π / 60) / 30.02 rad/s ≈ 15.7

Now we can calculate the amplitude of motion (X):

X = (0.6 kg.m / 706858 N/m) / sqrt((1 - 15.7^2)² + (2 * 0.10 * 15.7)²) ≈ 8.12 × 10⁻⁶ m

To calculate the force transmitted to the floor, we can use the formula:

Force = ur * ω² * m

Let's calculate the force:

Force = 0.6 kg.m * (1500 rpm * 2π / 60)² * 900 kg ≈ 397.9 N

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2. (30 points) Identify types of hazards, and explain them briefly by giving example codes. Then, show all the solutions with example codes to reduce the performance penalty caused by hazards.

Answers

Types of hazards include data hazards, control hazards, and structural hazards. These hazards can cause performance penalties in computer systems. Solutions to reduce performance penalties caused by hazards include techniques such as pipelining, forwarding, and branch prediction.

In computer architecture, hazards refer to situations that can negatively impact the execution of instructions and result in performance penalties. The three main types of hazards are:

1. Data hazards: Data hazards occur when there is a dependency between instructions that prevents them from executing simultaneously. This can happen when an instruction depends on the result of a previous instruction that has not yet completed.

2. Control hazards: Control hazards arise due to the conditional branching instructions that alter the program flow. When a branch instruction is encountered, the processor needs to determine the target address before proceeding. This can introduce delays and reduce performance.

3. Structural hazards: Structural hazards occur when there is a conflict for system resources, such as registers or execution units. This happens when multiple instructions require the same resource simultaneously.

To reduce the performance penalties caused by these hazards, various techniques can be employed. Pipelining is one such technique that allows for overlapping the execution of multiple instructions by dividing them into stages. Forwarding is used to eliminate data hazards by directly forwarding the results of one instruction to subsequent instructions. Branch prediction helps mitigate control hazards by predicting the outcome of branch instructions and fetching the correct instructions in advance.

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A single-input, single output system has the state variable representation x
˙
=Ax+Bu
y=Cx

where A=[ 0
−10

1
−5

]B=[ 1
0

]C=[ 0

10

] The transfer function of the system T(s)=Y(s)/U(s) is: a. a. T(S)= 5s 2
+5s+1
−50

b. c. T(S)= s 2
+10s+100
−100

c. b. T(S)= s 2
+5s+100
−50

d. d. T(S)= s 2
+5s+10
−100

Answers

T(s) = (5s^2 + 5s + 1) / (s^2 + 10s + 100). The transfer function represents the relationship between the Laplace transform of the output (Y(s)) and the Laplace transform of the input (U(s)).

The given state variable representation of the system can be used to derive the transfer function. By applying the Laplace transform to the state equations, we can obtain the transfer function representation.

Using the given matrices A, B, and C, we can write the state equation in matrix form as:

sX(s) = AX(s) + BU(s)

Y(s) = CX(s)

By rearranging the equations and performing the necessary calculations, we can obtain the transfer function T(s) = Y(s)/U(s) in terms of the Laplace variable s.

In this case, the transfer function is T(s) = (5s^2 + 5s + 1) / (s^2 + 10s + 100).

Therefore, option a) T(s) = 5s^2 + 5s + 1 / s^2 + 10s + 100 is the correct transfer function representation for the given system.

In summary, the transfer function of the system is T(s) = (5s^2 + 5s + 1) / (s^2 + 10s + 100). The transfer function relates the Laplace transforms of the output and input signals, and it is derived from the given state variable representation using the matrices A, B, and C.

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A 14.08 gram sample of manganese is heated in the presence of excess iodine. A metal iodide is formed with a mass of 79.13 g. Determine the empirical formula of the metal iodide.

Answers

The ratio of moles of iodine to moles of metal in the metal iodide is:iodine : metal = 0.5126 : 0.256= 2 : 1 This means that the empirical formula of the metal iodide is MI2, where M represents the metal.

The mass of manganese = 14.08 g The mass of metal iodide = 79.13 g To determine the empirical formula of the metal iodide, we need to find out the amount of iodine that reacted with manganese to form the metal iodide. To do this, we will subtract the mass of the manganese from the mass of the metal iodide. So, the mass of iodine in the reaction would be:Mass of iodine = mass of metal iodide - mass of manganese= 79.13 g - 14.08 g= 65.05 g Next, we need to convert the mass of iodine into moles using the molar mass of iodine. The molar mass of iodine is 126.9 g/mol. Number of moles of iodine = mass of iodine / molar mass of iodine= 65.05 g / 126.9 g/mol= 0.5126 mol. Now, we need to find the ratio of moles of iodine to moles of metal in the metal iodide. Since the metal is in excess in this reaction, the number of moles of metal in the metal iodide will be equal to the number of moles of manganese used in the reaction.Number of moles of manganese = mass of manganese / molar mass of manganese= 14.08 g / 54.94 g/mol= 0.256 mol Therefore, the ratio of moles of iodine to moles of metal in the metal iodide is:iodine : metal = 0.5126 : 0.256= 2 : 1.

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Example of reversed heat engine is O none of the mentioned O both of the mentioned O refrigerator O heat pump

Answers

The example of a reversed heat engine is a refrigerator., the correct answer is "refrigerator" as an example of a reversed heat engine.

A refrigerator operates by removing heat from a colder space and transferring it to a warmer space, which is the opposite of how a heat engine typically operates. In a heat engine, heat is taken in from a high-temperature source, and part of that heat is converted into work, with the remaining heat being rejected to a lower-temperature sink. In contrast, a refrigerator requires work input to transfer heat from a colder region to a warmer region, effectively reversing the direction of heat flow.

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P1 In a DSB-SC system the carrier is c(t) = cos (2nft) and the FT of the information signal is given by M(f) = rect(f/2), where f. >> 1. (a) Plot the DSB-SC modulated signal obse-sc(t) versus time t. (b) Plot the spectrum of the DSB-SC modulated signal (PDSB-Sc(f) versus frequency f. (c) Determine the bandwidth of the DSB-SC modulated signal.

Answers

P1: The DSB-SC modulated signal in a DSB-SC system can be represented by the equation sc(t) = Ac * m(t) * cos(2πfct), where Ac is the carrier amplitude, m(t) is the information signal, and fc is the carrier frequency.

(a) To plot the DSB-SC modulated signal, we need to multiply the information signal m(t) with the carrier waveform cos(2πfct). The resulting waveform will exhibit the sidebands centered around the carrier frequency fc.

(b) The spectrum of the DSB-SC modulated signal will show two sidebands symmetrically positioned around the carrier frequency fc. The spectrum will have a bandwidth equal to the maximum frequency component present in the information signal m(t).

(c) The bandwidth of the DSB-SC modulated signal can be determined by examining the frequency range spanned by the sidebands. Since the information signal has a rectangular spectrum extending up to f/2, the bandwidth of the DSB-SC signal will be twice this value, i.e., f.

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Calculate the change in mass-specific entropy in the following situations. Identify which assumptions you use for each of the calculations. Use the following properties for air: R=287 J/kg−K and c v

=720 J/kg−K. a. Isothermal compression of air from 10 m 3
/kg to 4 m 3
/kg b. Isothermal compression of air from 0.1MPa to 1.7MPa c. Isobaric heating of air from 300 K to 1200 K d. Isobaric heating of water at 1MPa from a saturated liquid to a saturated vapor 5. (14 points) Steam expands isentropically in a piston-cylinder arrangement from a pressure of P 1

=2MPa and a temperature of T 1

=500 K to a saturated vapor at State 2 . a. Draw this process on a T-S diagram. b. Calculate the mass-specific entropy at State 1 . c. What is the mass-specific entropy at State 2? d. Calculate the pressure and temperature at State 2.

Answers



a) Δs = 0, no assumptions used

b) Δs = 0, no assumptions used

c) Δs = 1.47 kJ/(kg K), ideal gas behavior

d) Δs = 6.11 kJ/(kg K), ideal gas behavior

a. Δs = 0, no assumptions used
For an isothermal process: Δs = q/T where q = 0 for an adiabatic process, so Δs = 0.
b. Δs = 0, no assumptions used
For an isothermal process: Δs = q/T where q = 0 for an adiabatic process, so Δs = 0.
c. Δs = 1.47 kJ/(kg K), ideal gas behavior
For an isobaric process: Δs = cv ln(T2/T1), where cv is the specific heat capacity at constant volume, given as 720 J/(kg K), and T2/T1 = 1200/300 = 4. Thus, Δs = 720 ln(4) = 1.47 kJ/(kg K).
d. Δs = 6.11 kJ/(kg K), ideal gas behavior
For an isobaric process: Δs = cp ln(T2/T1), where cp is the specific heat capacity at constant pressure. For a saturated liquid and a saturated vapor, the ideal gas assumption is used, and Δs = cp ln(Tsat,vapor/Tsat,liquid), where cp is given as 4.18 kJ/(kg K). Thus, Δs = 4.18 ln(423.8/293.2) = 6.11 kJ/(kg K).

b. Calculate the mass-specific entropy at State 1.
For state 1, P1 = 2 MPa, T1 = 500 K.

Using the steam tables, the entropy at state 1 is 7.2698 kJ/(kg K).
c. What is the mass-specific entropy at State 2?
For state 2, the steam is saturated vapor, so using the steam tables, the entropy at state 2 is 7.2698 kJ/(kg K).
d. Calculate the pressure and temperature at State 2.
Since the process is isentropic, we can use the steam tables to find the pressure and temperature at state 2 using the entropy at state 2. From the tables, the pressure at state 2 is 3.052 MPa and the temperature at state 2 is 300.67°C.

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QUESTION 28 Which of the followings is true? For FM and sinusoidal messages, is the modulation index. For arbitrary messages, the modulation index corresponds to O A.C. O B. D. C.A. D. B. QUESTION 29 Which of the followings is true? For angle modulation, the instantaneous frequency is defined as O A. half the slope of the instantaneous message frequency. B. the slope of the instantaneous phase. C. the slope of the instantaneous message frequency. D. half of the slope of the instantaneous phase.

Answers

For QUESTION 28, the correct statement is:A. For FM and sinusoidal messages, the modulation index corresponds to 1

.In Frequency Modulation (FM), the modulation index represents the extent to which the carrier frequency is varied in response to the modulating signal. When the modulating signal is a sinusoidal wave, the modulation index is equal to 1, indicating that the carrier frequency is modulated by the same amount as the amplitude of the modulating signal.For QUESTION 29, the correct statement is:C. For angle modulation, the instantaneous frequency is defined as the slope of the instantaneous message frequency.In angle modulation, which includes both Frequency Modulation (FM) and Phase Modulation (PM), the instantaneous frequency refers to the rate of change of the carrier signal's phase with respect to time. In the case of FM, the instantaneous frequency is directly related to the slope (rate of change) of the instantaneous message frequency. Therefore, option C accurately describes the definition of instantaneous frequency in angle modulation.

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The folding structure in differential amplifiers provides a better means to increase output swing compared to non-folded telescopic differential amplifiers. (T/F) (1, 2, 3, 4, 5) The folding structure in differential amplifiers provides a better means to increase its DC gain at the expense of power consumption compared to non-folded telescopic differential amplifiers. (T/F) (1, 2, 3, 4, 5) In a single-transistor common-source amplifier configuration, transistor's Vsat provides a good tool for trading off between its bandwidth and its power consumption. (T/F) (1, 2, 3, 4,5) Among the 4 different feedback structures, the current-current feedback is the best structure to be used as a current source/buffer. (T/F) (1, 2, 3, 4, 5) Shunt-Shunt feedback circuits are best suited to be used as voltage buffers. (T/F) (1, 2, 3, . 4,5) . Pole-splitting using compensation capacitors is an effective method for tradeoffs between circuit’s bandwidth and stability (T/F) (1, 2, 3, 4, 5) Pole-splitting using compensation capacitors is intended for reducing amplifier's bandwidth in order to increase its output swing. (T/F) (1, 2, 3, 4, 5)

Answers

The key components of a closed-loop feedback control system are the plant (system being controlled), sensor (measures the output), controller (generates control signal), actuator (executes control signal), and feedback loop (compares actual output to desired output).

What are the key components of a closed-loop feedback control system?

1. The folding structure in differential amplifiers does not necessarily provide a better means to increase output swing compared to non-folded telescopic differential amplifiers. (False)

2. The folding structure in differential amplifiers does not necessarily provide a better means to increase its DC gain at the expense of power consumption compared to non-folded telescopic differential amplifiers. (False)

3. In a single-transistor common-source amplifier configuration, the transistor's Vsat is not a good tool for trading off between bandwidth and power consumption. (False)

4. The current-current feedback is not necessarily the best structure among the four different feedback structures to be used as a current source/buffer. (False)

5. Shunt-Shunt feedback circuits are not necessarily the best suited for voltage buffers. (False)

6. Pole-splitting using compensation capacitors is an effective method for tradeoffs between circuit bandwidth and stability. (True)

7. Pole-splitting using compensation capacitors is not intended for reducing amplifier bandwidth to increase its output swing. (False)

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3.7 Please describe the advantages and disadvantages of up-wind
and down-wind horizontal wind turbines. To clarify your discussion,
you may wish to construct system diagrams.

Answers

Up-wind turbines offer higher efficiency and stability but come with increased complexity and costs, while down-wind turbines may have simpler design and lower costs but present challenges in stability and control.

What are the advantages and disadvantages of up-wind and down-wind horizontal wind turbines?

Up-wind and down-wind horizontal wind turbines are two different configurations used in wind turbine designs.

Advantages of up-wind horizontal wind turbines:

Higher efficiency: Up-wind turbines are positioned in front of the wind, allowing them to capture the undisturbed wind flow and achieve higher energy conversion efficiency.Better stability: The tower and support structure can be designed to provide stability by blocking turbulence caused by the rotor, resulting in smoother operation. Lower noise levels: The up-wind configuration reduces the noise generated by the interaction between the rotor and the tower.

Disadvantages of up-wind horizontal wind turbines:

Increased complexity: The turbine must incorporate a yaw mechanism to face the wind direction, which adds complexity and maintenance requirements. Higher costs: The additional components and mechanisms make up-wind turbines more expensive to manufacture and maintain.3. Limitations in wind speed range: Up-wind turbines may have a limited operating range, as they are prone to damage in high winds due to the increased exposure to turbulent wind conditions.

In contrast, down-wind horizontal wind turbines have their own set of advantages and disadvantages, which may include simpler design, lower costs, potential aerodynamic benefits, and challenges related to stability and turbine control.

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MOS scaling, downward in parameter value, is a driving force of "Moore's Law." Explain briefly why that is so. Presume you have MOS process with transistors in 2012- cm p-type Si, a gate oxide, Xo, of 100nm, a source/drain junction depth of 0.8um, a supply voltage of 5V and gate lengths varying between 1um – 10um. Your boss wants you to scale down to Vod of 2.5V, Xo of 50nm, lower rj to 0.4um and gate lengths of 0.5 um – 5um, using the same Si starting material. Calculate and plot, on one graph, Vī vs L for your existing process and the "new" process (cf. Fig. 19.3, for example), using, in each case, the "worst-case" drain voltage of Vds. What conclusions do you draw from your results?

Answers

MOS scaling, downward in parameter value, is a driving force of "Moore's Law" as it enables the miniaturization of transistors, leading to increased integration density and improved performance.

MOS scaling refers to reducing the dimensions of metal-oxide-semiconductor (MOS) transistors, such as gate length, gate oxide thickness, and junction depth. This scaling enables packing more transistors onto a chip, following Moore's Law, which states that the number of transistors on a chip roughly doubles every two years.

In the given scenario, the boss wants to scale down various parameters, including the gate length, supply voltage, gate oxide thickness, and source/drain junction depth. Scaling the gate length allows for faster switching speeds and reduced power consumption. Lowering the supply voltage reduces power dissipation and enables energy efficiency. Decreasing the gate oxide thickness enhances transistor performance and allows for better control of the channel. Reducing the source/drain junction depth improves the transistor's on-state resistance and reduces parasitic capacitance.

By comparing the existing process with the new process in terms of Vī (intrinsic voltage gain) versus L (gate length), we can analyze the impact of scaling. The graph will provide insights into how the changes in process parameters affect transistor performance.

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A fluid is said to be ideal, if it is (a) incompressible (b)
inviscous (c) viscous and incompressible (d) inviscous and
compressible (e) inviscous and incompressible.

Answers

The correct answer is (e) inviscous and incompressible. An ideal fluid is one that is both inviscous (having no internal friction or viscosity) and incompressible (maintaining a constant density regardless of pressure changes).

Inviscosity implies that the fluid flows without any resistance, while incompressibility means that its density remains constant under different pressure conditions. These characteristics simplify the mathematical modeling of ideal fluids, allowing for the use of simpler equations such as the Bernoulli's equation in fluid dynamics. While real fluids may not perfectly exhibit these properties, ideal fluid assumptions are often employed in theoretical analysis and engineering approximations.

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a) State two reasons why a three-phase system is preferred over a single-phase system for AC transmission and distribution of electrical energy. [2 marks] b) The winding of a three-phase delta connected generator produce the following voltages:- Vab (t) = 353.6 cos(314.16t) V 2π Vbc (t) = 353.6 cos (314.16t V 3 4π Vca(t) = 353.6 cos(314.16t -) V 3 The generator feeds a balanced three phase delta-connected load with impedance of 20+j34.6 22 per phase. The impedance of the line connecting the generator to the load is 3+j42 per phase. Determine:- (i) The three line currents IaA, Ibв and Icc [7 marks] (ii) The three-phase currents IAB, IBC and ICA at the load [2 marks] (iii) The total real power consumed by the delta connected load [2 marks] (iv) The capacitance per phase of a three-phase delta-connected capacitor bank required to be connected across the load terminals to achieve power factor of 0.98 lagging

Answers

a) Two reasons why a three-phase system is preferred over a single-phase system for AC transmission and distribution of electrical energy are:

1. Higher power transfer capacity: A three-phase system can transmit and distribute more power compared to a single-phase system, enabling efficient utilization of transmission lines and reducing costs.

2. Balanced loads: Three-phase systems provide balanced loads, resulting in smoother operation, reduced voltage fluctuations, and improved overall system stability.

b) (i) Line currents:

- IaA = (Vab - Vca) / Z_line

- IbB = (Vbc - Vab) / Z_line

- IcC = (Vca - Vbc) / Z_line

(ii) Phase currents at the load:

The phase currents at the load are the same as the line currents.

(iii) Total real power consumed by the load:

The total real power consumed by the load can be calculated using the formula:

P = 3 * |IAB|^2 * Re(Z_load)

  = 3 * |IAB|^2 * 20

(iv) Capacitance per phase of a delta-connected capacitor bank:

The provided information does not contain sufficient data to determine the capacitance per phase of the capacitor bank required to achieve a power factor of 0.98 lagging. Additional information, such as the load power factor and the system voltage, is needed for the calculation.

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consider true or an F for (10 pomis) Calculating setup-time cost does not require a value for the burden rate, Captured quality refers to the defects found before the product is shipped to the customer. The number of inventory turns is the average number of days that a part spends in production Flexibility never measures the ability to produce new product designs in a short time. Computers use an Alphanumeric System. While our words vary in length, computer words are of fixed length. In the spline technique, the control points are located on the curve itself. Bezier curves allow for local control. Wireframe models are considered true surface models. A variant CAPP system does not require a database containing a standard process plan for each family of parts. When similar parts are being produced on the same machines, machine setup times are reduced. The average-linkage clustering algorithm (ALCA) is well suited to prevent a potential chaining effect. PLCs are not microprocessor-based devices. PLC technology was developed exclusively for manufacturing. Ladder diagrams have been used to document connection circuits. In a ladder diagram each rung has at least two outputs. TON timers always need a Reset instruction. If the time base of a timer is one the preset value represents seconds Allen-Bradley timers have three bits (EN, DN, and TT). In an off-delay timer the enabled bit and the done bit become true at the same time.

Answers

Calculating setup-time cost does not require a value for the burden rate. Captured quality refers to defects found after the product is shipped. The number of inventory turns measures the average number of times inventory is sold or used in a given period.

Flexibility can measure the ability to produce new product designs quickly. Computers use a binary system, not an alphanumeric system. Words in computer systems are not of fixed length. Control points in the spline technique are not located on the curve itself. Bezier curves do allow for local control. Wireframe models are not considered true surface models. A variant CAPP system requires a database with standard process plans. Similar parts being produced on the same machines may reduce setup times. The average-linkage clustering algorithm is not specifically designed to prevent a chaining effect. PLCs are microprocessor-based devices. PLC technology was not developed exclusively for manufacturing. Ladder diagrams document connection circuits. Each rung in a ladder diagram can have multiple outputs. TON timers do not always need a reset instruction. The preset value of a timer represents the time base, not necessarily seconds. Allen-Bradley timers have more than three bits (EN, DN, and TT). In an off-delay timer, the enabled bit and the done bit do not become true at the same time.

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When the bike begins to roll, the tack is at an angle of =0 , at the height of the wheel's hub, or s= 370 mm above the ground. Find a formula for s=f(). Sketch a graph showing the tack's height above ground for 0 720 explain the five-step process used to prevent a security hack or breach. The load of an industrial concern is 400 kVA at a power factor of 75 lagging. An additional motor load of 100 kW is needed. Find the new kilovolt-ampere load if the motor to be added is an 80 power factor (leading) synchronous motor. Yes or No? If No, give a reason. Let f be a function. (a) Is it possible that f(2)=7 and f(3)=7? Yes. No. A function assigns each value of x in its domain to exactly one value of f(x). No. A function assigns each value of f(x) in its range to exactly one value of x. No. A function expecting a variable cannot be called with a constant argument. No. There is no possible function operations that would yield 7 from 3 . (b) Is it possible that f(2)=7 and f(2)=4 ? Yes. 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In which direction does the temperature increase fastest at the point (4,4,3)? Express your answer as a UNIT vector Find all critical points of the following function. f(x,y)=x 24x+y 2+18y What are the critical points? Select the correct choice below and fill in any answer boxes within your choice. A. The critical point(s) is/are (Type an ordered pair. Use a comma to separate answers as needed.) B. There are no critical points. Find all critical points of the following function. f(x,y)=4xy+x 4+y 4What are the critical points? Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The critical point(s) is/are (Type an ordered pair. Use a comma to separate answers as needed.) B. There are no critical points. Solve each quadratic equation by completing the square. -0.25 x - 0.6x + 0.3 = 0 . This characteristic is controlled by a gene with the alleles I: inhibition of pigment i : full pigment This gene also affects non-agouti cats. In orange cats, it gives rise to a colour called 'cameo' and in non-agouti, black cats gives a colour called 'smoke'. A range of other colours also occur when the I allele is present in cats that are genetically brown, lavender or blue. Examine poster 8. Note the effect of the 'I' allele on the three lighter kittens. Compare these with the three darker kittens. Q21. What is the genotype, with respect to the 'I', ' T ' and ' A 'genes, of the centre light kitten? Epistasis - genes interacting Epistasis refers to non-allelic gene interaction that impacts on a particular trait of an organism. That is, the alleles at one gene locus affect the outcome of the alleles at another gene locus. The interaction between the A and T genes as indicated above is a good example of epistasis. A black cat that is aa will not reveal its potential tabby striping with regard the T gene. Another example of epistasis in cats is the masking of colours by dominant white. Environmental impact of pump hydro station.question:1. What gains are there from using this form of the hydro pump station compared to more traditional forms (if applicable)2. What are the interpendencies of this pump hydro station with the environment?.3. We tend to focus on negative impacts, but also report on positive impacts. find the unit tangent vector T and the curvature k for the following parameterized curvea) r(t) = b) r(t) = Most people's:____.a. basic value system is inborn. b. changed in adulthood only through imposition. c. developed mainly in their teenage years. d. firmly in place by age 10. The graph of the exponential function f(x)=(1/2)^x is A. Not a function. B. Decreasing for all x. C. Constant for all x. D. Increasing for all x. a pole-vaulter holds out a 4.75 m pole horizontally in front of him. assuming the pole is uniform in construction, and that he holds the pole with one hand at the very end, and one hand 0.75 m from the end, what is the ratio of the force applied by the hand on the end of the pole to the weight of the pole? the formula of beryllium azide is be(n3)2 (azide is a polyatomic ion). what is the formula of scandium(iii) azide? group of answer choices scn3 sc(n3)2 sc(n3)3 sc3n3 A quadratic function has its vertex at the point (-4,-10). The function passes through the point (-9,8). When written in vertex form, the function is f(x) = a(x-h)^{2} + k, where: a= _______ h= _______ k= _______ he angular velocity vector of a spinning body points out of the page. If the angular acceleration vector points into the page then: A. the body is slowing down B. the body is speeding up C. the body is starting to turn in the opposite direction D. the axis of rotation is changing orientation E. none of the aboveRead more on Sarthaks.com - https://www.sarthaks.com/500395/the-angular-velocity-vector-of-a-spinning-body-points-out-of-the-page