# Questions tagged [volume]

The tag has no usage guidance.

270 questions
Filter by
Sorted by
Tagged with
34 views

### What causes increment in volume when compressive forces are applied on an object

Doubt When compressive forces are applied on a body, what causes increment in volume. According to me the volume should remain constant since the mass and density of body are constant.
37 views

### 2 gallon tank pressurized to 100 psi connected with a tube to a tractor tire with only 30 psi

2 gallon tank pressurized to 100 psi connected with a tube to a large tractor tire with only 30 psi. And the air does not move from tank to tire. Why? Can anyone link a YouTube video to explain ...
30 views

### How does the melting ice cube in a glass of water doesn't change the water volume? [duplicate]

that's problably a very noob question, and answer that i found is: the water volume was always the same, what is kinda obivius, but doesn't seen enought to me. So I can't stop thinking, were did the ...
15 views

### Force acting on a cube on all sides [closed]

A metallic cube of length L is stretched out uniformly by force F normal to each of its faces. Given Young's modulus and Poisson ratio, what is the deformation in the cube?
42 views

### Can you plot irreversible but quasi static processes on a $pV$ diagram?

I've often heard that you can't plot irreversible processes on a $pV$ diagram, but what about in the case where you have a quasi static process with friction? There still exists a curve of ...
9 views

### Does multiple outlets (at same level on tank) from an overhead tank increase pressure?

I have a tank that is about 1foot high from my shower, however the pressure(or volume) isn't sufficient. Is it possible to increase the pressure(or volume) at the showerhead by doing the following: ...
51 views

### When differential of $p$-$V$ $dW$ work equals $-pdV$?

The differential form of the first law takes the form $$dU=\delta Q + \delta W$$ or $$dU=TdS-pdV.$$ First, we know that $TdS=\delta Q$ for reversible process. So we can't say that $dU=\delta Q -pdV$. ...
48 views

### What causes volume of sound to decrease with distance?

I know about the inverse square law however I do not know why it actually decreases. Does it have to do with sound absorption, it runs out of energy so the vibrations lessen or as distance increases ...
33 views

### Why do some textbooks use $T$-$V$ diagram for temperature table instead of $p$-$V$ diagram?

I am confused about this thing. In the temperature table, the first column explains specific temperature and the second column explains corresponding saturation pressure. From what I understand, if ...
62 views

### Why is tire pressure lower when parking and higher while driving (and not rise more when driving faster)?

I just noticed this whenever I park the car for a while, the tire pressure goes to a lower value on all tires, and whenever I start driving, it goes higher. The difference is not so big, but it is ...
106 views

### Lost volume data of water and isopropanol mixtures [closed]

WHO has two recipes for disinfecting, based on ethanol and isopropanol (IPA). They typically start with an alcohol volume and then top it off with the other ingredients to 10 litre. One of the recipes ...
30 views

### Crossings in the $p$-$V$-diagram of Thermodynamic cycles

Today I was tasked with correcting and grading a first year thermodynamics exam and one student drew a very peculiar diagram for the Ericsson-cycle. In the p-V-diagram the isothermal expansion and ...
125 views

### Time period of piston performing SHM

Suppose I have a closed piston-cylinder system which contains an ideal gas,and it is being compressed adiabatically by the piston which has a vertical orientation,and in doing so,the piston is ...
39 views

### How can a Diesel motor be drawn on a $pV$-diagram?

Only quasi-static processes can be drawn on a PV-diagram, because during a quasi-static process thermodyanamic variables such as pressure $p$ and volume $V$ are well-defined. However, for example, the ...
22 views

### What Are The Physics and Air Pressure Effects of Extremely Large Bells

How would one go about figuring out the physical properties of when a bell is hit. Can I parameterize the diameter of the bell, its height, and the kinetic force of the knock to get the volume in ...
10 views

### How does the distribution of entropy in the expanding universe evolve? [duplicate]

Also, Is the entropy divided by the volume of the (observable) universe increasing with respect to time or is that number decreasing, unstable, or constant, or infinite?
101 views

### Intuition of $dV$ in $PdV$?

I seem to have some misunderstanding of $PdV$ in the first law of thermodynamics. $$P dV = T dS - d U$$ I have a ballon. I apply some work (or change the temperature inside the balloon). Now, ...
54 views

### Particle states per phase space volume of a quantum gas

Consider a quantum gas in a box with volume $V=L^3$ and temperature $T$, consisting of spinless bosons. Explain why the number $dN$ of "single-particle states" in a "momentum space volume" $d^3p$ is ...
134 views

### Boyle's Law and hot air balloon

A bit dumb question because it is really difficult to imagine it. :- Pressure is force per area. Talking about gases, the pressure is said to be the force molecules exert on walls of let's say a ...