1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ahrayia [7]
3 years ago
14

A closed system undergoes an adiabatic process during which the work transfer into the system is 12 kJ. The system then returns

to its original state via a non-adiabatic process during which the work transfer out of the system is 5 kJ. What is the magnitude and direction of the heat transfer for the second process?
Engineering
1 answer:
Harrizon [31]3 years ago
3 0

Answer:

Q= - 7 KJ

Heat is rejected

Explanation:

In first process:

Process is adiabatic so heat transfer will be zero.

Q= 0 For adiabatic process

Now from first law of thermodynamics

Q = ΔU + W

ΔU is the change in internal energy

Q is the heat transfer

W is the work.

So here Q= 0

And work is transfer to the system .It means that work done on the system so it will be taken as negative.

 W= - 12 KJ

Q = ΔU + W

0 = ΔU -12

ΔU = 12 KJ

It means that in first process internal energy of system  increase.

In second process:

non-adiabatic process and work done by system is 5 KJ.

Q = ΔU + W

U is the point function and it does not depends on the path follows it depends only on final and initial states.

So fro second process

ΔU  = - 12 KJ

Q= -12 + 5

Q= - 7 KJ

In magnitude Q= 7 KJ

It mean that heat is rejected from the system because it give negative sign.

You might be interested in
9. A vehicle is having routine maintenance performed.
dexar [7]

Answer: b

Explanation:

8 0
3 years ago
How to draw the output voltage waveform rectifier
tatyana61 [14]

Answer:

Half-wave rectifier converts an AC signal into a DC signal. It's called a half-wave because it only rectify the positive part of an AC signal.

AC Signal = An electrical signal that alternates between positive and negative voltage.

DC Signal = An electrical signal that only has positive voltage.

Rectify = A fancy word for converting something.

Adding a capacitor helps the positive part of the signal stay on longer. This work because the capacitor stores energy kinda like a battery. During the negative part of the AC signal, the energy stored in the capacitor will be drained and used, then the cycle repeats.

The load resistor is just there to prevent a short circuit from happening.

7 0
3 years ago
Consider a simply supported rectangular beam with a span length of 10 ft, a width of 8 in, and an effective depth of 20 in. Norm
yulyashka [42]

Answer:

beam with a span length of 10 ft, a width of 8 in, and an effective depth of 20 in. Normal weight concrete is used for the beam. This beam carries a total factored load of 9.4 kips. The beam is reinforced with tensile steel, which continues uninterrupted into the support. The concrete has a strength of 4000 psi, and the yield strength of the steel is 60,000 psi. Using No. 3 bars and 60,000 psi steel for stirrups, do the followings:

8 0
3 years ago
Fluid power is a. The technology that deals with the generation, control, and transmission of power-using pressurized fluids b.
snow_tiger [21]

Answer:  a) The technology that deals with the generation, control and transmission of power using pressurized fluids

Explanation: Fluid power is defined as the fluids which are under pressure and then are used for generation,control and transmit the power. Fluid power systems produces high forces as well as power in small amount . These systems usually tend to have better life if maintained properly. The force that are applied on this system can be monitored by gauges as well as meter.

8 0
3 years ago
If coolant is mixed 50-50 with water, what is the freezing point?
sashaice [31]

Answer:

-35 degrees F

When mixed in equal parts with water (50/50), antifreeze lowers the freezing point to -35 degrees F and raises the boiling temperature to 223 degrees F. Antifreeze also includes corrosion inhibitors to protect the engine and cooling system against rust and corrosion.

8 0
3 years ago
Other questions:
  • An immersion heater has a resistance of 50Ω and carries a current of 2.5A current. What will be the final temperature of 500 g o
    11·1 answer
  • A bar of 75 mm diameter is reduced to 73mm by a cutting tool while cutting orthogonally. If the mean length of the cut chip is 7
    10·1 answer
  • how to calculate the torque when a force is applied on a cog? explain the step-by-step and provide an illustration/diagram. Can
    15·1 answer
  • Q1. In electronic circuits it is not unusual to encounter currents in the microampere range. Assume a 35 μA current, due to the
    13·1 answer
  • Under which of the following conditions is a Type B-1 Fire extinguisher required onboard a motorized vessel?
    14·2 answers
  • Who's your favorite singer and WHT your favorite song​
    11·2 answers
  • List two skills that are useful when working in teams.
    11·2 answers
  • Which option identifies the type of engineering technician most likely to be involved in the following scenario?
    9·1 answer
  • Applications of fleming hand rule
    6·1 answer
  • For the floor plan shown, if a = sm b= 8m, specify type of Load on Beam AHS<br> D<br> B В
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!