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
Aneli [31]
3 years ago
12

An example of a transient analysis involving the 1st law of thermodynamics and conservation of mass is the filling of a compress

ed air tank. Assume that an air tank is being filled using a compressor to a pressure of 5 atm, and that it is being fed with air at a temperature of 25°C and 1 atm pressure. The compression process is adiabatic. Will the temperature of the air in the tank when it is done being filled i.e. once the pressure in the tank reaches 5 atm), be greater than, equal to, or less that the temperature of the 25°C air feeding the compressor?
A. Greater than 25°C
B. Unable to determine
C. Same as 25°C
D. Less than 25°C
Engineering
1 answer:
pickupchik [31]3 years ago
8 0

Answer:

<em>The temperature will be greater than 25°C</em>

Explanation:

In an adiabatic process, heat is not transferred to or from the boundary of the system. The gain or loss of internal heat energy is solely from the work done on the system, or work done by the system. The work done on the system by the environment adds heat to the system, and work done by the system on its environment takes away heat from the system.

mathematically

Change in the internal energy of a system ΔU = ΔQ + ΔW

in an adiabatic process, ΔQ = 0

therefore

ΔU = ΔW

where ΔQ is the change in heat into the system

ΔW is the work done by or done on the system

when work is done on the system, it is conventionally negative, and vice versa.

also W = pΔv

where p is the pressure, and

Δv = change in volume of the system.

In this case,<em> work is done on the gas by compressing it from an initial volume to the new volume of the cylinder. The result is that the temperature of the gas will rise above the initial temperature of 25°C </em>

You might be interested in
What is the Energy of moving things?<br><br> mechanical<br> sound<br> nuclear<br> Light
Elenna [48]

Answer: Kinetic energy

Explanation: If you live in a country other than UK you will probably call it something different

4 0
2 years ago
Read 2 more answers
An engineer is testing the shear strength of spot welds used on a construction site. The engineer's null hypothesis at a 5% leve
lilavasa [31]

Answer:

b) The null hypothesis should be rejected.

Explanation:

The null hypothesis is  that the mean shear strength of spot welds is at least

3.1 MPa

H0: u ≥3.1 MPa  against the claim Ha: u< 3.1 MPa

The alternate hypothesis is  that the mean shear strength of spot welds is less than 3.1 MPa.

This is one tailed test

The critical region Z(0.05) < ± 1.645

The Sample mean= x`= 3.07

The number of welds= n= 15

Standard Deviation= s= 0.069

Applying z test

z= x`-u/s/√n

z= 3.07-3.1/0.069/√15

z= -0.03/0.0178

z= -1.68

As the calculated z= -1.68  falls in the critical region Z(0.05) < ± 1.645 the null hypothesis is rejected and the alternate hypothesis is accepted that the mean shear strength of spot welds is less than 3.1 MPa

8 0
2 years ago
What prevented this weld from becoming ropey?
Mama L [17]

Answer:

If I am not mistaken I believe it is a higher voltage.

Explanation:

Hope this helps

8 0
2 years ago
Read 2 more answers
Solve the questions in the picture
STatiana [176]
15x -/c/ fb is the answer
6 0
2 years ago
What might cause birds in population to immigration To the island
loris [4]

Mass forest destruction

temperatures

7 0
3 years ago
Read 2 more answers
Other questions:
  • If 20 kg of iron, initially at 12 °C, is added to 30 kg of water, initially at 90 °C, what would be the final temperature of the
    6·1 answer
  • Briefly explain why small-angle grain boundaries are not as effective in interfering with the slip process as are high-angle gra
    5·1 answer
  • The heat input to an Otto cycle is 1000kJ/kg. The compression ratio is 8 and the pressure and temperature at the beginning of th
    8·1 answer
  • he ventilating fan of the bathroom of a building has a volume flow rate of 28 L/s and runs continuously. If the density of air i
    9·1 answer
  • 214Bi83 --&gt; 214Po84 + eBismuth-214 undergoes first-order radioactive decay to polonium-214 by the release of a beta particle,
    15·2 answers
  • A tension test is carried out on an Al alloy specimen which has an original diameter of 0.505 in and an original gauge length of
    15·1 answer
  • Which measuring tool will be used to determine the diameter of a crankshaft journal?
    8·1 answer
  • What are wheel cylinders used for?
    6·1 answer
  • g Clay sized particles in a river are likely to be transported as _______________________, whereas gravel sized particles are li
    5·1 answer
  • You are about to perform PMCS on your M1114? What resource should you use for the procedures and instructions for performing PMC
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!