Answer:d
Explanation:
Answer:
The Answer is actually C
Explanation:
Look up the definition
What type of drill bit can produce a blind hole with a flat bottom
Answer:
end mill 4 flute
Explanation:
you can simply hook it up
what information should a professional engineer keep private
Signal loss is the reduction of a signal that occurs in a medium as a function of the physical length of the channel. This is known as:_________
a. degradation.
b. attenuation.
c. frequency degradation.
d. amplitude degradation.
Answer:
B) Attenuation
Explanation:
Attenuation can be regarded as the loss of signal strength which could be as a result of both external and internal factors. This loss of signal strength could occur in networking cables as well as other connections. Attenuation is a loss in energy, because as signal travels, its strength decreases as a a result of distance it covers, this loss of energy is due to the signal trying to overcome the resistance at the medium. One of the main the causes of attenuation is When there is Extra noise on available networks, networks such as electrical current as well as radio waves. It should be noted that attenuation is Signal loss which is the reduction of a signal that occurs in a medium as a function of the physical length of the channel.
Singnal attenuation can taken care of by using lower loss materials with high cost, instead of making of PCB routing length reduction. Amplifiers can also be engaged in amplifying attenuated signal to get back the original signal, this will compensate the loss.
Attenuation can be measured in decibels(dB), this gives the measurement of relative strengths of one signal at two different point or measurement of two signals.
a misfire code is a type ____ DTC
A) 1 or 2
B) a or b
C) c or d
D l or ll
Answer:
A misfire code is a type A DTC.
Explanation:
A misfire code is a type A DTC.
A Misfire generate unburned hydrocarbons thereby increasing the load on the catalytic converter. Misfires are due to incomplete combustion or lack of combustion.
Diagnostic Trouble Code (DTC) is a type of code used by the vehicle’s onboard diagnostics (OBD) system to alert when the vehicle has a problem. Type A DTC is the most serious DTC, this are emissions related. It requests illumination of the MIL after one failed driving cycle and stores a freeze frame DTC after one failed driving cycle.
When a retaining structure moves towards the soil backfill, the stress condition is called:__________.
(A) at rest state,
(B) active state.
(C) passive state.
(D) both (B) and (C)
Answer:
(C) passive state.
Explanation:
The earth pressure is the pressure exerted by the soil on the shoring system. They are three types of earth pressure which are:
a) Rest state: In this state, the retaining wall is stationary, this makes the lateral stress to be zero.
b) Active state: In this state, the wall moves away from the back fill, this leads to an internal resistance. Hence the active earth pressure is less than earth pressure at rest
c) Passive state: In this state the wall is pushed towards the back fill, this leads to shearing resistance. Hence, the passive earth pressure is greater than earth pressure at rest
A picture of a ______ is the label pictogram on a chemical that warns of a product's acute toxicity.
A) Flame over circleB) Gas cylinderC) Skull and crossbonesD) Bomb
Answer:
C) Skull and crossbones
Explanation:
Its on the OSHA website under HCS Pictograms and Hazards
Explain why it is important to model the context of a system that is being developed. Give two examples of possible errors that could arise if software engineers do not understand the system context.
Answer:
Explanation:
System models are created and used in order for all of the individuals involved in the process to be able to see exactly how each module that is being created connects to the rest of the system. This allows every developer to understand each module's/part's function and develop it with the entire system in mind. This also makes it easier to implement newer features. If a model is not made then the developers may miss key features and when it is time to piece all of the components of the system together, the overall process can become a jumbled mess.
A dual-fluid heat exchanger has 10 lbm/s water entering at 100 F, 20 psia and leaving at 50 F, 20 psia. The other fluid is glycol entering at 10 F, 22 psia and leaving at 50 F, 22 psia. Find the required mass flow rate of glycol and the rate of internal heat transfer
Answer:
Rate of internal heat transfer = 23.2 Btu/Ibm
mass flow rate = 21.55 Ibm/s
Explanation:
using given data to obtain values from table F7.1
Enthalpy of water at temperature of 100 F = 68.04Btu/Ibm
Enthalpy of water at temperature of 50 F = 18.05 Btu/Ibm
from table F.3
specific constant of glycerin [tex]C_{p} = 0.58 Btu/Ibm-R[/tex]
The rate of internal heat transfer ( change in enthalpy )
h4 - h3 = Cp ( T4 - T3 ) --------------- ( 1 )
where ; T4 = 50 F
T3 = 10 F
Cp = 0.58 Btu/Ibm-R
substitute given values into equation 1
change in enthalpy ( h4 - h3 ) = 23.2 Btu/Ibm
Determine mass flow rate of glycol
attached below is the detailed solution
mass flow rate of glycol = 21.55 Ibm/s
What is the purpose of O-ring and valve seals in a cylinder head?
Answer:
its to show the shape is flat and only flat at the botom and top and you can set it up ther way and it wlll still look the same.
Explanation:
O rings and valve seals are used to block a path to prevent escape of a liquid or a gas.
What is cylinder head?The cylinder head controls air or fuel flow in and out of the cylinders.
The O ring in cylinder head is placed into a groove to secure them in place. They are compressed between two surfaces to have a seal pack. The O-ring or valve seal creates a air and liquid-tight mating surface.
Thus, O rings and valve seals are used to block a path to prevent escape of a liquid or a gas.
Learn more about cylinder head.
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Your friend has two substances A and B which are compressed liquid and superheated vapor respectively. Both are in rigid vessels. Your friend claims that when he cools down both substances they started to boil. Can this be true? Explain yourself using a T-v diagram.
Answer:
Following are the solution to the given question:
Explanation:
The material is necessary to cook since frying is a speedy process for evaporation.
Drug A is now in the compressed fluid area, and the material would not boil if the pressure is chilled. Because the ship is solid, its substance A claim is false.
Unless the volume comprises of a drop in the heat, the B substance reaches a vapor pressure area and a wet region. That's the area that melting may occur. His claim for material B could therefore be true.
Design a counter which counts in the sequence: (20 points) 0000, 1001, 1000, 0111, 0110, 0101, 0100, 0011, 0010, 0001, 0000,
a. Use D flip-flops.
b. Use J-K flip-flops.
c. Use S-R flip-flops.
d. Use T flip-flops.
e. Draw a complete state diagram for the counter of (b) showing what happens when the counter is started in each of the unused states.
Answer:
i think its a... i would get a better answer thoe
Explanation:
(A) Explain why residual thermal stresses are introduced into a glass piece when it is cooled.(B) Are thermal stresses introduced upon heating? Why or why not?
Answer:
Yes, they are
Explanation:
A
Assuming that a glass piece is cooled from an elevated temperature, then the internal stresses which are also called thermal stresses, gets inroduced due to result of the difference in cooling rate and that of the thermal contraction that exists between the surface and the interior regions. They can lead to fractures such as thermal shock, as a result, we deem these thermal stresses important.
B
Yes, they are. They are introduced upon heating due to the thermal expansion that takes place
Crank OA rotates with uniform angular velocity 0 4 rad/s along counterclockwise. Take OA= r= 0.5
m,AB2r,and BC 2r.For the instant, 45,OA is horizontal and AB is vertical.
determine the angular velocity and angular acceleration of BC.
Documentation of a flow chart?
Answer:
A Document in a flowchart represents a printout, for instance a document or a report.
Flowcharts are used in planning and documenting basic process or projects. Like different sorts of outlines, they help imagine what is happening and along these lines help comprehend a process, and maybe additionally find more subtle highlights inside the process.
Explanation:
A flowchart is essentially a graphical portrayal of steps. It shows steps in consecutive request and is generally used in introducing the progression of calculations or work process. Regularly, a flowchart shows the means as boxes of different sorts, and their request by interfacing them with bolts.
It is likewise a kind of graph that speaks to a work process or cycle. A flowchart can likewise be characterized as a diagrammatic portrayal of a calculation, a bit by bit way to deal with settling an assignment.
The flowchart shows the means as boxes of different sorts, and their request by associating the containers with bolts. This diagrammatic portrayal outlines an answer model to a given issue. Flowcharts are used in investigating, planning, reporting or dealing with a process or program in different fields.
A soil with a cohesion of 25 kPa has a normal stress of 39 kPa and a shear stress of 56 kPa at the point of failure. The angle of internal friction for the soil is most nearly:__________.
Answer:
39⁰
Explanation:
We have cohesion c = 25kpa
Then the normal stress = 39kpa
Shear stress = 56kpa
This question is asking us to find the angle of internal friction
Shear stress at the time of failure = cohesion C + normal stresstanΦ
56 = 25 + 39tanΦ
Φ = angle if refractive index
Φ = 38.48⁰
This is approximately 39⁰
Therefore in answer to this question, the angle of internal friction for the soil is nearly 39⁰
S
An ideal vapor-compression refrigeration cycle using refrigerant-134a as the working fluid is used to cool a brine solution to −5°C. This solution is pumped to various buildings for the purpose of air-conditioning. The refrigerant evaporates at −10°C with a total mass flow rate of 7 kg/s, and condenses at 600 kPa. Determine the COP of the cycle and the total cooling lo
Answer:
1141
7.2
Explanation:
The evaporator Temperature T1 = -10°C
h1 = 244.55kj/kg
S1 = 0.93782kj/kg
The enthalpy at second state from given condenser pressure from super heated refrigerant table
P2 = 600
S2 = S1
h2 = 267.19kj/kg
Enthalpy at 3 and 4 from condenser pressure
h3 = h4 = 81.5kj/kg
To get cooling load
QL = m(h1-h4)
M= 7
= 7(244.55-81.5)
= 7(163.05)
= 1141.35kw = 1141KW
COP
= h1-h4/h2 -h1
= 244.55-81.5/267.19-244.55
= 163.05/22.64
= 7.2
A wing generates a lift L when moving through sea-level air with a velocity U. How fast must the wing move through the air at an altitude of 10,000 m with the same lift coefficient if it is to generate the same lift?
Answer:
V1 = 1.721 * V2
Explanation:
To start with, we assume that both lift forces are equal, such that
L2 = L1
1 is that of the level at 10000 m, and 2 is that of the level at sea level.
Next, we try and substitute the general formula for both forces such that
C(l).ρ1/2.V1².A = C(l).ρ2/2.V2².A
On further simplification, we have
ρ1.V1² = ρ2.V2², making V1 subject of formula, we have
V1 = √(ρ2/ρ1). V2²
Using the values of density for air at 10000 m and at sea level(source is US standard atmosphere), we have
V1 = √(1.225/0.4135) * V2
V1 = √2.9625 * V2
V1 = 1.721 * V2
The process by which natural forces move weathered rock and soil from one place to another is called
a)soil conservation. b)deposition. c)abrasion. d)erosion
Answer:
Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water. A similar process, weathering, breaks down or dissolves rock, but does not involve movement.Erosion is the opposite of deposition, the geological process in which earthen materials are deposited, or built up, on a landform.
Most erosion is performed by liquid water, wind, or ice (usually in the form of a glacier). If the wind is dusty, or water or glacial ice is muddy, erosion is taking place. The brown color indicates that bits of rock and soil are suspended in the fluid (air or water) and being transported from one place to another. This transported material is called sediment.
Explanation:
Physical erosion describes the process of rocks changing their physical properties without changing their basic chemical composition. Physical erosion often causes rocks to get smaller or smoother. Rocks eroded through physical erosion often form clastic sediments. Clastic sediments are composed of fragments of older rocks that have been transported from their place of origin.Landslides and other forms of mass wasting are associated with physical weathering. These processes cause rocks to dislodge from hillsides and crumble as they tumble down a slope.
Landslides and other forms of mass wasting are associated with physical weathering. These processes cause rocks to dislodge from hillsides and crumble as they tumble down a slope.
Plant growth can also contribute to physical erosion in a process called bioerosion. Plants break up earthen materials as they take root, and can create cracks and crevices in rocks they encounter.
I HOPE I HELPED YOULucia is playing with magnetic toy vehicles. She has two identical toy vehicles (purple and pink) that start on opposite sides of a center magnet that cannot move. She moves both vehicles one space closer to the center magnet
Incomplete question. The remaining part of the question read;
How did the potential energy of the two vehicles change? Did the potential energy of one vehicle change more than the other? Why do you think so?
Explanation:
1. The potential energy of the two vehicles increased because we could observe that they have unlike poles moving towards the center of the magnet. So the magnet field would be repealing both toy vehicles.
2. The potential energy of the pink vehicle change more than the purple vehicle. This is evident as we notice the pink vehicle is closer to the center of the magnet than the other.
3. The reason for this is because Lucia exerts more force (potential energy) on the pink vehicle to fight the repelling effect of the magnet
Answer:
1. The potential energy of the two vehicles increased because we could observe that they have unlike poles moving towards the center of the magnet. So the magnet field would be repealing both toy vehicles.
2. The potential energy of the pink vehicle change more than the purple vehicle. This is evident as we notice the pink vehicle is closer to the center of the magnet than the other.
3. The reason for this is because Lucia exerts more force (potential energy) on the pink vehicle to fight the repelling effect of the magnet
Explanation:
Wich muscle in your body are affected by alcohol first
Answer:
Brain
Explanation:
Thirty seconds after your first sip, alcohol races into your brain. It slows down the chemicals and pathways that your brain cells use to send messages. That alters your mood, slows your reflexes, and throws off your balance.What are shims used for ?
To attain maximum power delivered to a load, what value of load impedance is required if 1. the load can have any complex value; 2. the load must be pure resistance?
Answer:
Explanation:
Maximum power will be delivered to the load if
Z(load) = Z(t)*
If the Thevenin is defined as Z(t) = R(t) + jX(t), then the load impedance will be
Z(load) = Z(t)* = R(t) - jX(t)
Finding the equivalent impedance, we have that
Z(eq) = Z(t) + Z(load)
Simplifying further, we have
Z(eq) = R(t) + jX(t) + R(t) - jX(t)
Z(eq) = 2R(t)
Therefore, maximum power will be delivered to the load when Z(load) = Z(t)*
Maximum power will be delivered to a pure resistance table if
R(load) = |Z(t)|
Again, if we define the impedance of Thevenin, we have
Z(t) = R(t) + jX(t)
And therefore, our load resistance is
R(load) = √[R(t)² + X(t)²]
A flat plate 1.5 m long and 1.0 m wide is towed in water at 20 o C in the direction of its length at a speed of 15 cm/s. Determine the resistance of the plate and the boundary thickness at its trailing end.
Answer:
15.8
0.0944
Explanation:
L = 1.5
B = 1.0
Speed of water = 15cm
Temperature = 20⁰C
At 20⁰C
Specific weight = 9790
Kinematic viscosity v = 1.00x10^-4m²/s
Dynamic viscosity u = 1.00x10^-3
Density p = 998kg/m²
Reynolds number
= 0.15x1.5/1.00x10^-4
= 225000
S = 5
5x1.5/225000^1/2
= 0.0158
= 15.8mm
Resistance on one side of plate
F = 0.664x1x1.0x10^-3x0.15x225000^1/2
= 0.04724N
Total resistance
= 2N
= 2x0.04724
= 0.0944N
please any one know how to find the unit hydrograph ????!!!!!!!!!!! its important
Answer:
roughly 13,or 12, or 11
Explanation:
Which of the following is NOT a type of independent front suspension?
Select one:
a. Short long arm (SLA)
b. Solid axle
c. Double wishbone
d. Twin I-beam
Answer d
Explanation:
Technician A says that some vehicle makers do NOT apply undercoating to the floor pan. Technician B says that some vehicle makers do NOT apply anti-corrosion compound to interior cavities. Who is right?
Answer:
Explanation:
Both technicians are right
Calculate the torque developed by a motor that delivers 200 hp rotation at 3600 rpm. Use the Torque value to determine the diameter of a solid steel shaft with an allowable shear stress of 20,520 psi.
Solution :
Given:
Power, P = 200 hp
= 110000 lbf ft/s
Speed, N = 3600 rpm
Power , [tex]$P=\frac{2 \pi NT}{60}$[/tex]
∴ Torque, [tex]$T = \frac{60 P}{2 \pi N}$[/tex]
[tex]$T = \frac{60 \times 110000}{2 \pi \times 3600}$[/tex]
T = 291.93 lb -ft
[tex]$T_{allow} = 20,250 \ psi$[/tex] ---- allowable shear stress
Therefore, torque , T = 391.93 lb-ft
T = 291.93 x 12 lb-in
∴ T 3503.16 lb-in
Now from the Torsion formula,
[tex]$\frac{T}{J}=\frac{T_{allow}}{ r}$[/tex]
Here, [tex]$r=\frac{d}{2} ; \ \ \ J=\frac{\pi d^4}{32}$[/tex] ---- polar moment of inertia.
∴ [tex]$\frac{T}{\frac{\pi d^4}{32}}=\frac{T_{allow}}{ d/2}$[/tex]
[tex]$T_{allow}=\frac{16 T}{\pi d^3}$[/tex]
[tex]$\pi d^3=\frac{16 \times 3503.16}{20520}$[/tex]
[tex]$\pi d^3 = 2.7315$[/tex]
[tex]$d^3 = 0.8699$[/tex]
or [tex]$d= (0.8699)^{1/3}$[/tex]
d = 0.9546 in
Therefore the diameter of the shaft is 0.9546 in.
Technician A says that a live axle is an axle that drive the vehicle. Technician B says that a dead axle means that the axle can be steered. Who is correct?
Answer:
technician a is correct
Explanation:
a live axle is an axle that gives out power or torque. a dead axle is an axle that supports the wheels, thus technician a is correct.
hope this helps
its a tricky one, wouldnt be surprised if i was wrong.
Calculate the number of vacancies per cubic meter at 1000∘C for a metal that has an energy for vacancy formation of 1.22 eV/atom, a density of 6.25g/cm^3, and an atomic weight of 37.4 g/mol.
(A) 1.49×10^18 m^−3
(B) 7.18×10^22 m^−3
(C) 1.49×10^24 m^−3
(D) 2.57×10^24 m^−3
Answer:
C
Explanation:
N = Na.P/A------(1)
Na = avogadro's number = 6.02210²³
P = density
A = atomic weight of metal
When we substitute into equation 1 above we get
1.0x10²⁹atoms/m³
From here we calculate the number of vacancies
T = 1000⁰c = 1273K
The formula to use is
Nv= Nexo(Qt/K.T) -----(2)
Qt = 1.22eV
K = Boltzmann's constant = 8.6210x10^-5
When we substitute values into equation 2
We get Nv = 1.49 x 10²⁴m-3
Therefore option c is correct
Check attachment for a more detailed calculation of this question
What project is this ?
Answer:
a building project...
Explanation:
