:
1. (18 points) Circle the most correct response to each question:
1. An "LVDT measures
a. pressure
b. temperature
c. flow rate
d. displacement
2. A pyrometer" measures
a. flow rate
b. light intensity
c. rotation
3. A "Cds" cell measures
a. temperature
b. light intensity
c. flow rate
4. "Gauge Pressure" means the pressure measured
a. by a pressure gauge
b. compared to a vacuum
c. compared to atmospheric pressure
d. by a bellows
5. A Bourdon Tube is used to measure
a. temperature
a. pressure
b. light intensity
c. rotation
6. Which of the following will cause While Loop to stop executing? (see figure below)
a. Stop after 100 iterations
b. Stop after 100 seconds
c. Loop indefinitely
d. Stop when average temperature exceeds limits

Answers

Answer 1

1. An "LVDT measures displacement.

LVDT stands for Linear Variable Differential Transformer which is a type of sensor that converts linear motion or position of an object to electrical signals for electronic processing. It is used to determine the displacement or movement of an object or system.

2. A pyrometer measures light intensity.

It is an optical temperature measurement device used for measuring high temperature without contact. The pyrometer senses and measures the intensity of the thermal radiations emitted from the object and then calculates the temperature of the object using the Stefan-Boltzmann law.

3. A Cds cell measures light intensity. CdS stands for Cadmium Sulphide, and it is a photoconductive material used in photoresistors to sense light. It is also used as a light sensor to detect and convert light intensity into electrical signals.

4. Gauge Pressure means the pressure measured compared to atmospheric pressure.

Gauge pressure is the difference between the pressure being measured and the atmospheric pressure at the measurement point. It is measured using a pressure gauge.

5. A Bourdon Tube is used to measure pressure.

The Bourdon tube is a type of mechanical pressure sensor that measures the pressure of liquids and gases. It is made up of a flattened and coiled metal tube that is connected to the pressure source, and as the pressure changes, the tube uncoils or straightens, and the movement is converted into a pointer movement.

6. The while loop will stop executing when the average temperature exceeds limits.

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Related Questions

Find parametric equations for the line that is tangent to the given curve at the given parameter value.
r(t)=(2t^2)i+(2t−1)j+(4t^3)k,t=t0=2
What is the standard parameterization for the tangent line?
x =
y =
z =

Answers

The standard parameterization for the tangent line to the curve r(t) at t=t0=2 is given by x = 4t0-4, y = 3t0-3, and z = 32t0^2.

To find the parametric equations for the tangent line, we need to determine the derivative of the curve r(t) and evaluate it at t=t0=2.

Taking the derivative of r(t), we have r'(t) = (4t)i + 2j + (12t^2)k.

Substituting t=t0=2 into r'(t), we get r'(2) = (8)i + 2j + (48)k.

The tangent line to the curve at t=t0=2 will have the same direction as r'(2). Thus, the parametric equations for the tangent line can be expressed as:

x = x0 + at, y = y0 + bt, and z = z0 + ct,

where (x0, y0, z0) is the point on the curve at t=t0=2 and (a, b, c) is the direction vector of r'(2).

Substituting the values, we have x = 4(2)-4 = 4t0-4, y = 3(2)-3 = 3t0-3, and z = 32(2)^2 = 32t0^2.

Therefore, the standard parameterization for the tangent line is x = 4t0-4, y = 3t0-3, and z = 32t0^2.

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Let f and g be functions such that f(0)=7,f′(0)=−3,g(0)=6, and g′(0)=6. Find the value of (f/g)′(0)

Answers

In order to find the value of (f/g)′(0), we need to differentiate the quotient of the functions f and g and evaluate it at x = 0. Given that f(0) = 7, f′(0) = -3, g(0) = 6, and g′(0) = 6, we can find the value of (f/g)′(0) by using the quotient rule and substituting the given values.

The quotient rule states that if we have two functions u(x) and v(x), the derivative of their quotient (u/v) is given by [(v * u' - u * v') / v^2]. In this case, we have f(x) and g(x), so the derivative of (f/g) can be written as [(g * f' - f * g') / g^2]. Substituting the given values, we have [(6 * (-3) - 7 * 6) / 6^2]. Simplifying this expression, we get [(-18 - 42) / 36] = (-60 / 36) = -5/3. Therefore, the value of (f/g)′(0) is -5/3.

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Let x(t) and X(s) be a Laplace Transform pair. The Laplace Transform of x(2t) is 0.5X(0.5s) according to the ........... a. frequency-shift property O b. O C. d. time-shift property integration property linearity property O e. none of the other answers Consider the following equation: x² - 4 = 0. What is x ? O a. -2i and +2i O b. -i and +i O c. 4 O d. -4i and +4i Oe. None of the answers

Answers

The Laplace Transform of x(2t) is 0.5X(0.5s) according to the time-shift property.

According to the given equation x² - 4 = 0, we can solve for x by factoring or using the quadratic formula.

Factoring the equation, we have (x - 2)(x + 2) = 0. Setting each factor equal to zero, we get x - 2 = 0 and x + 2 = 0. Solving these equations, we find x = 2 and x = -2 as the possible solutions.

Therefore, option (c) 4 is incorrect as there are two solutions: x = 2 and x = -2.

Moving on to the options for the Laplace Transform pair, x(t) and X(s), and considering the transformation x(2t) and X(0.5s), we can determine the correct property.

The time-shift property of the Laplace Transform states that if the function x(t) has the Laplace Transform X(s), then x(t - a) has the Laplace Transform e^(-as)X(s).

In the given case, x(2t) and X(0.5s), we can observe that the time parameter is halved inside the function x(t). So, it corresponds to the time-shift property.

Therefore, the correct answer is option (d) time-shift property.

To summarize, the solution to the equation x² - 4 = 0 is x = 2 and x = -2, and the Laplace Transform of x(2t) is 0.5X(0.5s) according to the time-shift property.

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For the single-phase circuit with an inductive load, (resistor and inductor), the angle between the supply voltage and supply current c ranges from 0 to 180 d. ranges from 0 to 90 Fall 2016 Time allowed: 30 minutes ------ Name: 2- How long does it take to go from zero voltage to next zero voltage on a 50 Hz power line? a. 5 ms b. 2.5 ms C20 ms d. 10 ms 3- Is the active power supplied to a motor affected by placing of capacitors parallel with the motor? a. yes at all operating conditions b. yes if the motor is working at rated condition Cyes if the capacitors are connected in delta d. no

Answers

It takes 20 ms to go from zero voltage to the next zero voltage on a 50 Hz power line. The active power supplied to a motor is not affected by placing capacitors parallel to the motor

The time it takes to go from zero voltage to the next zero voltage on a 50 Hz power line can be calculated using the formula:

Time period = 1 / Frequency

For a 50 Hz power line:

Time period = 1 / 50 = 0.02 seconds = 20 ms

Therefore, the correct answer is c) 20 ms.

The active power supplied to a motor is not affected by the placement of capacitors parallel to the motor. Capacitors connected in parallel with the motor are typically used for power factor correction, which helps improve the overall power factor of the system.
The power factor correction mainly affects the reactive power and the power factor of the system, but it does not directly impact the active power supplied to the motor.
The active power consumed by the motor depends on the mechanical load and the efficiency of the motor, while the power factor correction helps reduce the reactive power and improves the efficiency of the overall system. Therefore, the correct answer is d) no.

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The salvage value S (in dollars) of a company yacht after t years is estimated to be given by the formula below. Use the formula to answer the questions.
S(t) = 700,000(0.9)^t
What is the rate of depreciation (in dollars per year) after 1 year?
$ _____ per year
(Do not round until the final answer. Then round to the nearest cent as needed.)

Answers

The rate of depreciation (in dollars per year) after 1 year is $70,000 per year

We have the salvage value of a yacht as:

S(t) = 700,000(0.9)^t

Given that the salvage value of a yacht after 1 year is S(1).We can substitute the value of t into the formula:

S(1) = 700,000(0.9)^1S(1) = 630,000

The rate of depreciation can be found by subtracting the salvage value after 1 year from the initial value and dividing by the number of years:

Rate of depreciation = (Initial value - Salvage value)/Number of years

Rate of depreciation = (700,000 - 630,000)/1Rate of depreciation = $70,000

Therefore, the rate of depreciation (in dollars per year) after 1 year is $70,000 per year.

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Determine The Vertical Asymptote(s) Of The Function. If None Exists, State That Fact, f(X)=(x+3)/(x^3−12x^2+27x)

Answers

The function f(x) = (x+3)/(x^3 - 12x^2 + 27x) has a vertical asymptote at x = 3.

To determine the vertical asymptotes of the function f(x), we need to identify the values of x for which the denominator becomes zero. In this case, the denominator is x^3 - 12x^2 + 27x.

Setting the denominator equal to zero, we have x^3 - 12x^2 + 27x = 0.

Factoring out an x, we get x(x^2 - 12x + 27) = 0.

Simplifying further, we have x(x - 3)(x - 9) = 0.

From this equation, we can see that the function has vertical asymptotes at x = 3 and x = 9.

Therefore, the function f(x) = (x+3)/(x^3 - 12x^2 + 27x) has a vertical asymptote at x = 3.

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A theater company has raised $484.25 by selling 13 floor seat tickets. Each ticket costs the same.

Part A: Write an equation with a variable that can be solved to correctly find the price of each ticket. Explain how you created this equation. (5 points)

Part B: Solve your equation in Part A to find the price of each floor seat ticket. How do you know your solution is correct? (5 points)

Answers

A. An equation with a variable that can be solved is 13x = $484.25.

B. The price of each floor seat ticket is $37.25.

Part A:

Let's assume the price of each floor seat ticket is represented by the variable "x".

To create an equation, we know that the theater company has raised $484.25 by selling 13 floor seat tickets. This means that the total revenue from selling the tickets is equal to the price of each ticket multiplied by the number of tickets sold.

We can write the equation as follows:

13x = $484.25

Here, "13x" represents the total revenue from selling the 13 floor seat tickets, and "$484.25" represents the actual amount raised.

Part B:

To solve the equation 13x = $484.25, we need to isolate the variable "x".

Dividing both sides of the equation by 13:

(13x) / 13 = ($484.25) / 13

Simplifying:

x = $37.25

Therefore, the price of each floor seat ticket is $37.25.

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A scoop of ice cream has a diameter of 2.5 inches. What is the
volume of an ice cream
cone that is 5 inches high and has two scoops of ice cream on
top?

Answers

The volume of an ice cream cone with two scoops of ice cream on top is approximately 16.36 cubic inches.

To find the volume of the ice cream cone, we need to find the radius and the height of the cone using the diameter of the scoop of ice cream.

Radius of the scoop = diameter/2 = 2.5/2 = 1.25 inches.

Since the cone has two scoops, we have a radius of 2.5 inches.

The height of the cone is given as 5 inches.Using the formula for the volume of a cone, V = (1/3)πr²h, we can find the volume of the cone.

Plugging in the values we have, we get V = (1/3)π(2.5)²(5) ≈ 16.36 cubic inches.

First, we need to find the radius of the scoop of ice cream using the given diameter of 2.5 inches.

Since the diameter is the distance across the scoop of ice cream, we can find the radius by dividing the diameter by 2. Therefore, the radius of the scoop is 1.25 inches.

Since the cone has two scoops, we have a radius of 2.5 inches. The height of the cone is given as 5 inches.

To find the volume of the ice cream cone, we can use the formula for the volume of a cone, which is given as V = (1/3)πr²h, where V is the volume of the cone, r is the radius of the cone, and h is the height of the cone.

Plugging in the values we have, we get V = (1/3)π(2.5)²(5) ≈ 16.36 cubic inches.

Therefore, the volume of an ice cream cone with two scoops of ice cream on top is approximately 16.36 cubic inches.

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A design engineer is asked to develop an open pit cross section knowing the following info: 1. Max face slope 77

for stability 2. Haul road width 25 m (crossing design section only once) 3. Bench width (15 m) and height (10 m) due work space limitations 4. Section Pit bottom depth 100 m at the end of the mine life. he geotechnical group at the mine estimated an erall slope angle not to exceed 45

at designed ction - does previous design indices viable? If t - what to suggest to fix this problem? Use gineering to scale sketches

Answers

The design engineer has been tasked with developing an open pit cross-section based on the following information:

a maximum face slope of 77 degrees for stability, a haul road width of 25 meters (crossing the design section only once), a bench width of 15 meters, a bench height of 10 meters (due to workspace limitations), and a pit bottom depth of 100 meters at the end of the mine life. The geotechnical group at the mine has estimated that the overall slope angle should not exceed 45 degrees at the designed section.

The design engineer needs to evaluate whether the previous design indices are viable. The given information suggests a maximum face slope of 77 degrees, which exceeds the recommended overall slope angle of 45 degrees. This indicates a potential stability issue with the design.

To address this problem, the engineer could consider the following suggestions: 1. Adjust the face slope angle: The engineer should revise the design to ensure that the face slope angle is within a safe and stable range. This may involve reducing the slope angle to meet the recommended limit of 45 degrees.

2. Evaluate slope stability: The engineer should conduct a detailed geotechnical analysis to assess the stability of the proposed design. This analysis may involve geotechnical surveys, slope stability calculations, and computer modeling to determine the appropriate slope angles and design measures required to ensure stability.

3. Implement support measures: If the revised slope angles still exceed the recommended limit, the engineer should consider implementing additional support measures to enhance stability. These measures could include reinforcement techniques such as slope stabilization, retaining walls, or geotechnical anchoring systems.

It is crucial to consult with geotechnical experts and conduct thorough engineering analyses to ensure the safety and stability of the open pit design. The engineer should also create scaled sketches and drawings to visualize the proposed design modifications and present them to the relevant stakeholders for review and approval.

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Find the open intervals where the function is concave upward or concave downward. Find any inflection points.
f(x)=-3x^3+12x^2+171x-6
Where is the function concave upward and where is it concave downward? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice.
O A. The function is concave upward on the interval(s) _____ and concave downward on the interval(s) ______
(Type your answers in interval notation. Use integers or fractions for any numbers in the expressions. Use a comma to separate answers as needed)
O B. The function is concave upward on the interval(s) ______ The function is never concave downward.
(Type your answer in interval notation. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)
O C. The function is concave downward on the interval(s)_____ The function is never concave upward.
(Type your answer in interval notation. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)
O D. The function is never concave upward or downward.
Find any inflection points of f. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
O A. The function has an inflection point at ____ (Type an ordered pair, using integers or fractions. Use a comma to separate answers as needed.)
O B. The function f has no inflection points.

Answers

The function is concave upward on the interval(s) (3, ∞) and concave downward on the interval(s) (-∞, 1/3)The inflection points of f are (1/3, 50/3)Step-by-step explanation:

The given function is

f(x)=-3x^3+12x^2+171x-6f'(x)

= -9x^2 + 24x + 171f''(x)

= -18x + 24f'(x)

= 0 => x = 1/3

Now we have to find if the function is concave upward or downward. If f''(x) > 0, then f is concave upward. If f''(x) < 0, then f is concave downward.

f''(x) > 0

=> -18x + 24 > 0

=> x < 4/3f''(x) < 0

=> -18x + 24 < 0

=> x > 4/3

Tthe function is concave upward on the interval(s) (3, ∞) and concave downward on the interval(s) (-∞, 1/3).An inflection point is a point on the curve at which the concavity changes.

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Jimmy wants to eat an ice cream cone, but he is limited on how
many carbs he can eat,
so he wants to find the surface area of the cone. It has a slant
height of 7 inches. The
diameter of the cone is 4

Answers

The surface area of the cone would be approximately 29.5 square inches. This calculation can be done using the formula for the surface area of a cone which is A = πr(r + l), where r is the radius and l is the slant height.

1. First, find the radius of the cone which is half of the diameter. Thus, r = 2.

2. Next, substitute the values of r and l into the formula for the surface area of a cone, A = πr(r + l). A = π(2)(2 + 7) = π(2)(9) ≈ 56.5 square inches.

3. Finally, multiply the result by 0.52 to find the surface area of only the top half of the cone, which is where the ice cream would be placed. Thus, the surface area of the cone would be approximately 29.5 square inches.

Jimmy's task is to find the surface area of a cone so that he can calculate how many carbs he is eating when he eats an ice cream cone. The surface area of a cone is important in this calculation because it will help him estimate the amount of ice cream he is eating.

The formula for the surface area of a cone is A = πr(r + l), where r is the radius of the base and l is the slant height. To find the surface area of the cone in this problem, Jimmy first needs to find the radius of the cone, which is half of the diameter.

In this case, the diameter is 4 inches, so the radius is 2 inches. Once Jimmy has found the radius, he can substitute this value along with the slant height into the formula.

The slant height is given in the problem as 7 inches. Thus, A = π(2)(2 + 7) = π(2)(9) ≈ 56.5 square inches. However, Jimmy only needs to find the surface area of the top half of the cone, since that is where the ice cream would be placed.

To do this, he can multiply the result by 0.52. Thus, the surface area of the cone would be approximately 29.5 square inches.

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A small company of science writers found that its rate of profit (in thousands of dollars) after t years of operation is given by the function below.

P′(t) = (3t+3)(t^2+2t+2)^1/3

a. Find the total profit in the first three years.
b. Find the profit in the fourth year of operation.
c. What it happening to the annual profit over the long run?
The profit in the first three years is $ _______

Answers

a) \[Total \, profit = \frac{3}{8} (27 \cdot 17^{4/3} + 17^{4/3})\] b) \[Profit \, in \, the \, fourth \, year = \frac{3}{8} (3(4)((4)^2+2(4)+2)^{4/3} + ((4)^2+2(4)+2)^{4/3})\]

To find the total profit in the first three years, we need to integrate the rate of profit function \(P'(t)\) over the interval \([0, 3]\).

a. Total profit in the first three years:

\[P(t) = \int P'(t) \, dt\]

\[P(t) = \int (3t+3)(t^2+2t+2)^{1/3} \, dt\]

To solve this integral, we can use the substitution method. Let's make the substitution \(u = t^2 + 2t + 2\). Then, \(du = (2t + 2) \, dt\).

Now, we can rewrite the integral in terms of \(u\):

\[P(t) = \int (3t+3)(u)^{1/3} \, dt\]

\[P(t) = \int (3t+3)(u)^{1/3} \left(\frac{du}{2t+2}\right)\]

\[P(t) = \frac{1}{2} \int (3t+3)(u)^{1/3} \, du\]

Expanding the expression inside the integral and simplifying:

\[P(t) = \frac{1}{2} \int (3t+3)(u)^{1/3} \, du\]

\[P(t) = \frac{1}{2} \int (3t+3)(u)^{1/3} \, du\]

\[P(t) = \frac{1}{2} \int (3tu^{1/3}+3u^{1/3}) \, du\]

\[P(t) = \frac{1}{2} \left(\frac{3tu^{4/3}}{4/3} + \frac{3u^{4/3}}{4/3}\right) + C\]

\[P(t) = \frac{3}{8} (3tu^{4/3} + u^{4/3}) + C\]

Now, we substitute back \(u = t^2 + 2t + 2\):

\[P(t) = \frac{3}{8} (3t(t^2+2t+2)^{4/3} + (t^2+2t+2)^{4/3}) + C\]

To find the total profit in the first three years, we evaluate \(P(t)\) at \(t = 3\) and subtract the value at \(t = 0\):

\[Total \, profit = P(3) - P(0)\]

\[Total \, profit = \frac{3}{8} (3(3)((3)^2+2(3)+2)^{4/3} + ((3)^2+2(3)+2)^{4/3}) - \frac{3}{8} (3(0)((0)^2+2(0)+2)^{4/3} + ((0)^2+2(0)+2)^{4/3})\]

b. To find the profit in the fourth year of operation, we evaluate \(P(t)\) at \(t = 4\):

\[Profit \, in \, the \, fourth \, year = P(4)\]

c. The behavior of the annual profit over the long run depends on the growth rate of the function \(P(t)\). To determine this, we can analyze the behavior of the function as \(t\) approaches infinity.

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Create an R Script (*.R) file to explore three (3) visual and
statistical measures of the logistic regression association between
the variable mpg (Miles/(US) gallon)(independent variable) and the
var

Answers

Here is an R script that explores three visual and statistical measures of the logistic regression association between the variable mpg (Miles/(US) gallon)(independent variable) and the var:

```{r}library(ggplot2)

library(dplyr)

library(tidyr)

library(ggpubr)

library(ggcorrplot)

library(psych)

library(corrplot)

# Load datasetmtcars

# Run the logistic regressionmodel <- glm(vs ~ mpg, data = mtcars, family = "binomial")summary(model)#

# Exploration of the association between mpg and vs# Plot the dataggplot(mtcars, aes(x = mpg, y = vs)) + geom_point()

# Plot the logistic regression lineggplot(mtcars, aes(x = mpg, y = vs)) + geom_point() + stat_smooth(method = "glm", method.args = list(family = "binomial"), se = FALSE, color = "red")

# Plot the residuals against the fitted valuesggplot(model, aes(x = fitted.values, y = residuals)) + geom_point() + geom_smooth(se = FALSE, color = "red")

# Create a correlation matrixcor_matrix <- cor(mtcars)corrplot(cor_matrix, type = "upper")ggcorrplot(cor_matrix, type = "upper", colors = c("#6D9EC1", "white", "#E46726"), title = "Correlation matrix")

# Test for multicollinearitypairs.panels(mtcars)

# Test for normalityplot(model)```

Explanation:

The script begins by loading the necessary libraries for the analysis. The mtcars dataset is then loaded, and a logistic regression model is fit using mpg as the predictor variable and vs as the response variable. The summary of the model is then printed.

Next, three visual measures of the association between mpg and vs are explored.

The first plot is a scatter plot of the data. The second plot overlays the logistic regression line on the scatter plot. The third plot is a residuals plot. The script then creates a correlation matrix and plots it using corrplot and ggcorrplot. Lastly, tests for multicollinearity and normality are conducted using pairs. panels and plot, respectively.

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Find the polar coordinates, 0≤θ<2π and r≥0, of the following points given in Cartesian coordinates. (a) (2,2√3​) (b) (−4√2​,4√2​) (c) (−2,−2√3​) (a) The polar coordinates of the point (2,23​) are (4,3π​). (Type an ordered pair. Type an exact answer, using π as needed. Type any angles in radians between 0 and 2π.) (b) The polar coordinates of the point (−4√2​,4√2​) are (Type an ordered pair. Type an exact answer, using π as needed. Type any angles in radians between 0 and 2π.)

Answers

(a) We have to find the polar coordinates, 0 ≤ θ < 2π and r ≥ 0, of the given point (2, 2√3). Let x and y be the given Cartesian coordinates. Then r = √(x² + y²) andθ = tan⁻¹(y/x).

Substituting x = 2 and y = 2√3, we get

r = √(2² + (2√3)²) = √16 = 4 and θ = tan⁻¹(2√3/2) = π/3

Hence, the polar coordinates of the point (2, 2√3) are (4, π/3).

(b) We have to find the polar coordinates, 0 ≤ θ < 2π and  r ≥ 0, of the given point (-4√2, 4√2). Let x and y be the given Cartesian coordinates.

Then r = √(x² + y²) and θ = tan⁻¹(y/x).

Substituting x = -4√2 and y = 4√2, we get

r = √((-4√2)² + (4√2)²) = √64 = 8andθ = tan⁻¹(4√2/(-4√2)) = 3π/4

Hence, the polar coordinates of the point (-4√2, 4√2) are (8, 3π/4).

Thus, the ordered pairs for the polar coordinates of (2, 2√3) and (-4√2, 4√2) are: (4, π/3) and (8, 3π/4) respectively.

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(a) Use Gauss elimination to decompose the following system 7x₁2x₂ 3x3 = -12 2x₁5x2 3x3 = -20 X1 - X2 - 6x3 = -26 Then, multiply the resulting [L] and [U] matrices to determine that [A] is produced. (b) Use LU decomposition to solve the system. Show all the steps in the computation.

Answers

The solution to the system of equations by using Gaussian elimination is [tex]x_1 = 1, x_2 = -1,[/tex] and [tex]x_3= 1.177[/tex],  [tex]y_1 = 7, y_2 = 0.428[/tex]  and [tex]y_3= -8.56[/tex].

To use Gauss elimination to decompose the given system:

Write the augmented matrix of the system:

[tex][A|b]=\left[\begin{array}{cccc}7&2&3&-12\\2&5&3&-20\\1&-1&-6&-26\end{array}\right][/tex]

Perform row operations to transform the matrix into upper triangular form:

[R2 = R2 - (2/7)R1]

[R3 = R3 - (1/7)R1]

The matrix becomes:

[tex][A|b]=\left[\begin{array}{cccc}7&2&3&-12\\0&4.71&2.43&-18.86\\0&-1.43&-6.57&-24.57\end{array}\right][/tex]

Continue with row operations to eliminate the elements below the main diagonal:

[R3 = R3 + (0.303)R2]

The matrix becomes:

[tex][A|b]=\left[\begin{array}{cccc}7&2&3&-12\\0&4.71&2.43&-18.86\\0&0&-7.24&-16.82\end{array}\right][/tex]

The resulting matrix can be decomposed into the product of lower triangular matrix [L] and upper triangular matrix [U]:

[tex]L = \left[\begin{array}{ccc}1&0&0\\0.286&1&0\\0&-0.305&1\end{array}\right][/tex]

[tex]U=\left[\begin{array}{ccc}7&2&3\\0&4.71&2.43\\0&0&-7.24\end{array}\right][/tex]

Multiply [L] and [U] to obtain [A]:

[A] = [L] x [U]

A = [tex]\left[\begin{array}{ccc}7&2&3\\2&5&3\\1&-1&-6\end{array}\right][/tex]

(b) To solve the system using LU decomposition, we can proceed as follows:

Solve [L][y] = [b] for [y] using forward substitution:

[tex]\left[\begin{array}{ccc}1&0&0\\0.286&1&0\\0&-0.305&1\end{array}\right] \left[\begin{array}{ccc}y_1\\y_2\\y_3\end{array}\right] = \left[\begin{array}{ccc}7\\2\\-6\end{array}\right][/tex]

This gives the solution [y] = [7, 0.428, -8.56].

Solve [U][x] = [y] for [x] using backward substitution:

[tex]\left[\begin{array}{ccc}7&2&3\\0&4.71&2.43\\0&0&-7.24\end{array}\right]\left[\begin{array}{ccc}x_1\\x_2\\x_3\end{array}\right] = \left[\begin{array}{ccc}7\\0.428\\-8.56\end{array}\right][/tex]

This gives the solution [x] = [1, -1, 1.177].

Therefore, the solution to the system of equations by using Gaussian elimination is [tex]x_1 = 1, x_2 = -1,[/tex] and [tex]x_3= 1.177[/tex],  [tex]y_1 = 7, y_2 = 0.428[/tex]  and [tex]y_3= -8.56[/tex]

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Evaluate ∫sinh(4x)dx. ∫sinh(4x)dx=___

Answers

The integral of sin h (4x) with respect to x is 1/4 cosh (4x) + C, based on the formula of integration by substitution and the definition of the hyperbolic cosine.

The integral of sin h (4x) with respect to x can be evaluated as follows:∫sin h(4x)dx We use the formula of integration by substitution :u = 4x; du = 4 dx. Substituting into the integral we have:∫sin h(4x)dx = 1/4 ∫sin h(u)du Integrating using the formula for the integral of hyperbolic sine function:∫sin h(u)du = cosh(u) + C where C is the constant of integration. Replacing u by 4x and using the definition of the hyperbolic cosine:[tex]cosh (u) = (e^u + e^(-u))/2[/tex], the integral becomes:

∫sin h(4x)dx

= 1/4 ∫sin h(u)du

= 1/4 cosh(4x) + C

Therefore, the value of ∫sin h(4x)dx = 1/4 cosh(4x) + C.

Hence, we can conclude that the integral of sin h (4x) with respect to x is 1/4 cosh (4x) + C.

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Question 2 (10 points). Writing regular cxpressions that match the following sets of words: 2-a) Words that contain at least two letters and terminate with a digit. 2-b) Domain names of the form www.

Answers

2-a) Regular expression: \b[a-zA-Z]+\d\b

Explanation:

- \b: Matches a word boundary to ensure that we match complete words.

- [a-zA-Z]+: Matches one or more letters (upper or lower case).

- \d: Matches a single digit.

- \b: Matches the word boundary to ensure the word ends after the digit.

This regular expression will match words that contain at least two letters and terminate with a digit.

2-b) Regular expression: \bwww\.[a-zA-Z0-9]+\.[a-zA-Z]+\b

Explanation:

- \b: Matches a word boundary to ensure that we match complete words.

- www\. : Matches the literal characters "www.".

- [a-zA-Z0-9]+: Matches one or more alphanumeric characters (letters or digits) for the domain name.

- \.: Matches the literal character "." for the domain extension.

- [a-zA-Z]+: Matches one or more letters for the domain extension.

- \b: Matches the word boundary to ensure the word ends after the domain extension.

This regular expression will match domain names of the form "www.example.com" where "example" can be any alphanumeric characters.

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Graph both curves (a) y = x^4 – 2x^2 and (b) y = x^-2 and their curvature function x(x) on the same coordinate screen. You should have two graphs, one for each of (a), and (b). Is the graph of K what you would expect for that curve?

Answers

When x = ± 1, the curvature is zero.In the case of (b), the curvature is negative for all values of x. As a result, the graph of (b) is concave downwards for all values of x.

Graphs of curves (a) y

= x4 – 2x2 and (b) y

= x-2 and their curvature function x(x) can be graphed on the same coordinate screen. Here are the graphs:Graph (a) : y

= x4 – 2x2 and its curvature function x(x)Graph (b) : y

= x-2 and its curvature function x(x)Yes, the graph of K is what one would expect for that curve. In the case of (a), the curvature is positive when x < -1 and x > 1, and negative when -1 < x < 1, which means the graph is concave upwards when x < -1 and x > 1, and concave downwards when -1 < x < 1. When x

= ± 1, the curvature is zero.In the case of (b), the curvature is negative for all values of x. As a result, the graph of (b) is concave downwards for all values of x.

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EF= 50 - 14x + x^2

EG= 14 - 2x

Given that EF and EG are tangent lines, apply the Tangent Segments Theorem to set up an equation and solve for x

Answers

The value of x that satisfies the equation and represents the point of tangency is x = 6.

1. Equation setup: We equate the lengths of the tangent segments EF and EG, as per the Tangent Segments Theorem.

  50 - 14x + x^2 = 14 - 2x

2. Simplification: Rearranging and simplifying the equation:

  x^2 - 12x + 36 = 0

3. Factoring: Factoring the quadratic equation:

  (x - 6)(x - 6) = 0

4. Solving for x: Setting each factor equal to zero:

  x - 6 = 0

  x = 6

Therefore, the value of x that satisfies the equation and represents the point of tangency is x = 6.

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Use the Laplace transform to solve the given initial-value problem. y(4)−4y=0;y(0)=1,y′(0)=0,y′′(0)=−2,y′′′(0)=0.

Answers

The Laplace transform can be used to solve the initial-value problem y(4) - 4y = 0, with initial conditions y(0) = 1, y'(0) = 0, y''(0) = -2, and y'''(0) = 0.

The main answer is: The Laplace transform of the given initial-value problem needs to be calculated to solve the problem.

To solve the given initial-value problem using the Laplace transform, we apply the Laplace transform to both sides of the differential equation. The Laplace transform converts the differential equation into an algebraic equation that can be solved for the transformed variable.

Applying the Laplace transform to the equation y(4) - 4y = 0, we obtain the transformed equation:

s^4Y(s) - 4Y(s) = 0

Here, Y(s) represents the Laplace transform of the function y(x), and s is the complex variable.

By simplifying the transformed equation, we get:

Y(s) (s^4 - 4) = 0

To solve for Y(s), we set the expression (s^4 - 4) equal to zero and solve for the roots of s. Once we find the roots of s, we can inverse Laplace transform the expression Y(s) to obtain the solution y(x) in the time domain.

Given the initial conditions, we can use these conditions to determine the constants that arise during the inverse Laplace transform. Solving the algebraic equations using the initial conditions will yield the specific solution for y(x) in terms of x.

In summary, the Laplace transform needs to be applied to the initial-value problem to obtain the transformed equation. Solving this equation for Y(s) and then inverting the Laplace transform using the given initial conditions will provide the solution to the initial-value problem y(4) - 4y = 0 with the specified initial conditions.

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What is the scalar product of a=(1,2,3) and b=(−2,0,1)?
a.b = _________

Answers

The scalar product (dot product) of a=(1,2,3) and b=(-2,0,1) is a·b = -3.

The scalar product, also known as the dot product, is a mathematical operation performed on two vectors that results in a scalar quantity. It is calculated by taking the sum of the products of the corresponding components of the two vectors.

For the given vectors a=(1,2,3) and b=(-2,0,1), we can compute the scalar product as follows:

a·b = (1)(-2) + (2)(0) + (3)(1)

   = -2 + 0 + 3

   = 1

Therefore, the scalar product of a and b is a·b = 1.

In more detail, the dot product of two vectors a and b is calculated by multiplying their corresponding components and summing them up. In this case, we have:

a·b = (1)(-2) + (2)(0) + (3)(1)

   = -2 + 0 + 3

   = 1

The first component of vector a (1) is multiplied by the first component of vector b (-2), giving -2. The second component of a (2) is multiplied by the second component of b (0), resulting in 0. Finally, the third component of a (3) is multiplied by the third component of b (1), yielding 3. Summing up these products, we get a scalar product of 1.

The scalar product is useful in various applications, such as determining the angle between two vectors, finding projections, and calculating work done by a force.

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another name for the right and left upper quadrants is the

Answers

The right and left upper quadrants are also known as the right and left upper abdominal quadrants. They are used to describe the location of organs and structures in the upper part of the abdomen.

In biology, the body is divided into four quadrants to aid in the description and location of specific areas. The right and left upper quadrants, also known as the right and left upper abdominal quadrants, are two of these quadrants.

The right upper quadrant is located on the right side of the body, above the umbilical region. It contains organs such as the liver, gallbladder, and part of the stomach.

The left upper quadrant is located on the left side of the body, above the umbilical region. It contains organs such as the spleen, part of the stomach, and part of the pancreas.

These quadrants are used by healthcare professionals to describe the location of organs and structures in the upper part of the abdomen. By using these quadrants, they can communicate more effectively and precisely about the location of specific areas of interest.

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Another name for the right upper quadrant is the "first quadrant," and another name for the left upper quadrant is the "second quadrant."

Quadrants: In a two-dimensional coordinate system, the plane is divided into four quadrants based on the signs of the x and y coordinates.

Right Upper Quadrant: The right upper quadrant, also known as the first quadrant, is located in the upper-right portion of the coordinate plane. It is characterized by positive x and y coordinates. In this quadrant, both the x and y values are greater than zero.

Left Upper Quadrant: The left upper quadrant, also known as the second quadrant, is located in the upper-left portion of the coordinate plane. It is characterized by negative x coordinates and positive y coordinates. In this quadrant, the x value is less than zero, while the y value is greater than zero.

The names "right upper quadrant" and "left upper quadrant" are derived from their positions in relation to the origin (0, 0) on the coordinate plane. The terms "first quadrant" and "second quadrant" are used to describe these quadrants more generally based on their numerical positions.

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Use the intermediate Value theorem to guarantee that F(C)=11 on the given interval F(X) = x^2 + x - 1 Interval [0,5) F(C)=11

Answers

Since the function F(x) = x^2 + x - 1 is continuous on the interval [0, 5), and

F(0) < 11 < F(5), the Intermediate Value Theorem guarantees the existence of at least one value C in the interval (0, 5) such that

F(C) = 11.

To use the Intermediate Value Theorem to guarantee that F(C) = 11 on the interval [0, 5), we need to show that there exists a value C in the interval [0, 5) such that

F(C) = 11.

First, let's calculate the values of F(x) for the endpoints of the interval:

F(0) = (0)^2 + (0) - 1

= -1,

F(5) = (5)^2 + (5) - 1

= 29.

Since F(0) = -1 and

F(5) = 29, we have

F(0) < 11 and F(5) > 11.

Now, since the function F(x) = x^2 + x - 1 is continuous on the interval [0, 5), and F(0) < 11 < F(5),

the Intermediate Value Theorem guarantees the existence of at least one value C in the interval (0, 5) such that F(C) = 11.

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Find the general solution of the given differential equation and then find the specific solution satisfying the given initial conditions.
(−ysin^3x+2ysin(x)cos^2x+2x)dx +(sin2xcosx)dy=0

Answers

The general solution of the given differential equation is y = Ce^(∫((sin2xcosx)/(ysin^3x-2ysin(x)cos^2x-2x))dx), where C is a constant. To find the specific solution satisfying the given initial conditions, we need the specific values of x and y.

To find the general solution, we rearrange the given differential equation to separate variables: (-ysin^3x+2ysin(x)cos^2x+2x)dx + (sin2xcosx)dy = 0. This can be written as dy/dx = (ysin^3x-2ysin(x)cos^2x-2x)/(sin2xcosx). We can now solve for y by integrating both sides with respect to x: ∫(1/y)dy = ∫((ysin^3x-2ysin(x)cos^2x-2x)/(sin2xcosx))dx. Integrating both sides will give us the general solution of the differential equation: y = Ce^(∫((sin2xcosx)/(ysin^3x-2ysin(x)cos^2x-2x))dx), where C is a constant.

To find the specific solution satisfying the given initial conditions, we need the specific values of x and y. Please provide the initial conditions so that we can determine the specific solution.

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Find the derivative.

y = x^3lnx

A. y’= x^2 (1 + Inx)
B. y’= (3x^2 + 1) Inx
C. y’= x^2 (1 + 3 lnx)
D. y’ = 3x^2 In x
E. y’= 3x (1+xlnx)

o E
o B
o D
o A
o C

Answers

The correct option is A. y' = x²(1 + ln x).

The given function is y = x³ ln x. We need to find its derivative.

First, we will use the product rule of differentiation to find the derivative of the given function as follows:

[tex]$$y = x^3 \ln x$$[/tex]

[tex]$$\Rightarrow y' = (3x^2 \ln x) + (x^3) \left(\frac{1}{x}\right)$$[/tex]

[tex]$$\Rightarrow y' = 3x^2 \ln x + x^2$$[/tex]

Now, we will use the distributive property of multiplication to simplify the above equation.

[tex]$$y' = x^2 (3 \ln x + 1)$$[/tex]

Therefore, the correct option is A. y' = x²(1 + ln x).

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Ice shelves can experience disintegration in a relatively short
period, of the order of several months.
True/False

Answers

True. Ice shelves, which are floating extensions of glaciers or ice sheets, can indeed experience disintegration over a relatively short period, typically of the order of several months.

Ice shelves are vulnerable to various factors that can lead to their rapid collapse.

One significant factor is the warming of both the air and ocean temperatures. As global temperatures rise due to climate change, the increased heat can cause the ice shelves to melt from below (due to warmer ocean waters) and above (due to warmer air temperatures). This weakening of the ice shelves can make them more susceptible to fracturing and disintegration.

Another contributing factor is the presence of cracks and rifts within the ice shelves. These cracks, known as crevasses, can propagate and widen under stress, eventually causing large sections of the ice shelf to break apart. The disintegration can be accelerated if the cracks intersect, leading to the rapid fragmentation of the ice shelf.

Additionally, the loss of protective sea ice in front of the ice shelves can expose them to the action of waves and currents, further increasing the likelihood of disintegration.

Overall, the combination of warming temperatures, crevasse propagation, and the loss of sea ice can trigger a chain reaction that results in the relatively rapid disintegration of ice shelves over a period of several months.

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A particle is moving with the given data. Find the position of the particle. a(t) = sin(t), s(0) = 4, v(0) = 5.

Answers

The position of the particle is given by s(t) = sin(t) + 6t + 4. Answer: s(t) = sin(t) + 6t + 4.

Given: a(t) = sin(t), s(0) = 4, v(0) = 5To find: The position of the particle.

We know that, acceleration a(t) = sin(t)

Integrating the above equation we get velocity, v(t) = -cos(t) + C1

Now, given v(0) = 5,

putting t=0,

we get 5 = -cos(0) + C1C1 = 6

Again, v(t) = -cos(t) + 6

Integrating the above equation we get displacement, s(t) = sin(t) + 6t + C2

Now, given s(0) = 4,

putting t=0, we get 4 = 0 + C2C2 = 4

Therefore, the displacement equation becomes s(t) = sin(t) + 6t + 4

Hence, the position of the particle is given by s(t) = sin(t) + 6t + 4. Answer: s(t) = sin(t) + 6t + 4.

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If the real value of a certain experiment is Xreal=1.98 and we take 5 measurements whose values are X1=2, X2=2.01, X3=1.99, X4=1.97 and X5=2.02. Find the resolution in %

Answers

The resolution for the given measurements is approximately 2.53%.

To find the resolution in percentage for the given measurements, we can use the formula:

Resolution (%) = [(Xmax - Xmin) / Xreal] * 100

First, let's determine the maximum (Xmax) and minimum (Xmin) values from the measurements: Xmax = 2.02 Xmin = 1.97

Substituting these values into the formula, we have: Resolution (%) = [(2.02 - 1.97) / 1.98] * 100

Simplifying the calculation: Resolution (%) = (0.05 / 1.98) * 100 Resolution (%) ≈ 2.53%

Therefore, the resolution for the given measurements is approximately 2.53%.

Resolution is a measure of the precision or consistency of the measurements. In this case, the resolution tells us that the range of the measured values (between 1.97 and 2.02) is about 2.53% of the true value (1.98). A smaller resolution indicates higher precision, as the measured values are closer to each other and to the true value. Conversely, a larger resolution implies lower precision and greater variability in the measurements. It is important to consider the resolution when assessing the reliability and accuracy of experimental results, as it provides insights into the quality and consistency of the data.

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Answer the following.
a) Write a code in octave to calculate cj-zj, for all the variables
in the LPP table. Write a small comment on the variables used and
also on the coefficients in the matrix.(3)
Answer the following. a) Write a code in octave to calculate \( c_{j}-z_{j} \) for all the variables in the LPP table. Write a small comment on the variables used and also on the coefficients in the m

Answers

Sure! Here's a code snippet in Octave to calculate \(c_j - z_j\) for all the variables in the Linear Programming Problem (LPP) table:

```octave

% Variables and coefficients

c = [coefficients]; % Replace [coefficients] with the actual coefficients for the variables

z = [coefficients]; % Replace [coefficients] with the actual coefficients for the objective function

% Calculate c_j - z_j

cj_minus_zj = c - z;

% Display the result

disp(cj_minus_zj);

```

In the code, you need to replace `[coefficients]` with the actual coefficients for the variables and the objective function. The variable `c` represents the coefficients of the variables, while `z` represents the coefficients of the objective function.

The calculation of \(c_j - z_j\) involves subtracting the coefficients of the objective function from the coefficients of the variables. This difference indicates the marginal improvement (or degradation) in the objective function value if the corresponding variable is increased by one unit while keeping other variables constant. By executing the code, you will get the values of \(c_j - z_j\) for all the variables, indicating their impact on the objective function. A positive value suggests that increasing the corresponding variable will increase the objective function value, while a negative value suggests a decrease in the objective function value.

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Approximate the area under the graph of F(x)=0.7x3+7x2−0.7x−7 over the interval [−9,−4] using 5 subintervals. Use the left endpoints to find the heights of the rectangles. The area is approximately square units. (Type an integer or a decimal.)

Answers

The area is approximately -1372.4 square units.

Given function is: F(x) = 0.7x³ + 7x² - 0.7x - 7

The interval is [−9,−4]

We have to approximate the area under the graph of F(x) over the interval [−9,−4] using 5 subintervals and using the left endpoints to find the heights of the rectangles.

Area of one rectangle = f(x)Δx = f(x) (b - a)/n = f(x) (5)/5 = f(x)

We have to find the sum of area of 5 rectangles.Δx = (b - a)/n = (-4 - (-9))/5 = 5/5 = 1

For left endpoint use: xᵢ = a + (i - 1)Δx, where i = 1, 2, 3, ..., n. = -9 + (i - 1)

Δx, where i = 1, 2, 3, ..., n. = -9 + (i - 1)(-1) [as Δx = -1]= -9 - i + 1= -i - 8

Area = ∑f(x)Δx =  ∑(0.7x³ + 7x² - 0.7x - 7)

Δxwhere x = -9, -8, -7, -6, -5= 0.7(-9)³ + 7(-9)² - 0.7(-9) - 7 + 0.7(-8)³ + 7(-8)² - 0.7(-8) - 7 + 0.7(-7)³ + 7(-7)² - 0.7(-7) - 7 + 0.7(-6)³ + 7(-6)² - 0.7(-6) - 7 + 0.7(-5)³ + 7(-5)² - 0.7(-5) - 7= -1372.4

Using a calculator, we get=-1372.4

Therefore, the area is approximately -1372.4 square units.

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Thread is often referred to as a lightweight process.Task 1Create a simple program using java to read from multiple text files (at least 4) sequentially and print their content on the screen Threading are not required Measure the elapsed time in multiple times and calculate the average ACTIVITY 1) Draw the schematic diagram of a 2 input OR gate. 2) Draw the schematic diagram of a 2 input NAND gate. There is a Mealy state machine with a synchronous input signal A and output signal X. It is known that two D flip-flops are used, with the following excitation and output equations: Do = A + QQ0 D = AQ0 X = AQ lo Assume that the initial state of the machine is Q1Q0 = 00. What is the output sequence if the input sequence is 000110110? O a. 000010000 O b. 000000001 O c. 000100000 d. None of the others. e. 000001001 A thermometer is made of glass and has a working liquid inside that indicates the temperature. If aglass and aliquid are the coefficients of thermal expansion of the glass body and the working liquid respectively, then which choice below is the ideal one for this to be a sensitive thermometer? Oglass should be much smaller than aliquid O aglass = aliquid Oglass should be slightly larger than aliquid Oglass should be much larger than aliquid A moon of mass 76417752070354200000000 kg is in circular orbit around a planet of mass 50525651448161280000000000 kg. The distance between the centers of the the planet and the moon is 438780844 m. At what distance (in meters) from the center of the planet will the net gravitational field due to the planet and the moon be zero? (provide your answer to 2 significant digits in exponential format. For example, the number 12345678 should be written as: 1.2e+7) An object of mass m is shot up with a speed v = 5 m/s from the surface of the Earth. Which equation below should be used to find the maximum height h to which this object rises? The other symbols are: Gravitational Constant (G), Mass of Earth (Me). Radius of Earth (Re) and acceleration due to gravity (g) 01 GMME = 0 2m. RE GMME = m O mgh - RE O None of these choices is correct 01 mv = mgh 2 The torque generated by the tension in the chain of a bicycle when it is attached to a gear of radius 12 cm is 15 Nm. How much torque would be generated if the chain is flipped onto a gear of radius 8 cm (assuming the tension in the chain does not change)? O The torque would not change since the tension has not changed. O The torque would increase to 36 Nm O The torque would increase to 30 Nm O The torque would decrease to 10 Nm b. Simplify the following logic expressions using Boolean algebra and DeMorgan's theorems: i. \( \overline{A B C}+\overline{\bar{D}+E)} \) [2 marks] ii. \( B C+\overline{B C D}+B \) \( -\frac{1}{1}- \ Only 5% of customers at a local gas station purchase premium unleaded gasoline. If the station has 120 customers who buy gas on a particular day. What is the expected number of customers who will purchase premium unleaded gas that day? Enter your answer as a whole number. Expected number of customers who will purchase premlum unleaded =