All Questions
Tagged with classical-mechanics thermodynamics
193
questions
2
votes
1
answer
1k
views
Calculation of work done in different processes of thermodynamics in Physics and Chemistry
I am a high school student and I am very confused in thermodynamics, My confusion is that :In physics, when we study thermodynamics, we say that we cannot find the work done in irreversible processes ...
- 470
0
votes
2
answers
680
views
What is the meaning of equation of state of system: $F(p,V,T)=0$?
I am studying thermodynamics at a beginners level. I just can't understand what $F(p,V,T)=0$ means mathematically and how should I read this equation.
p=pressure
V=volume
T=temperature
I don't know ...
0
votes
1
answer
32
views
What is Homogeneity and isotropy in terms of thermodynamic system ?Also the difference between them?
I searched about it on web but was not able to find the difference between isotropy and homogeneity in terms of a Thermodynamic system.
So, I wanted to know the difference between them in a ...
2
votes
3
answers
1k
views
Why do we need an absolute temperature scale?
I am a high school student and I am little confused in thermometry,
My textbook says that, "the liquid in glass thermometer might read the same temp. at the chosen reference points i.e boiling ...
- 470
0
votes
2
answers
39
views
Sunlight-powered device set to change world: will it work? [closed]
Vast areas of desert sand are being shone on upon by the sun. Now that's some ENERGY!
Using this proposed apparatus:
Sunlight over large area is concentrated on steam chamber, where water turns into ...
- 340
0
votes
1
answer
76
views
Importance of fluid mechanics and mechanics in physics and pipes
How does mechanics help prevent the pipes from bursting?
How does it link to the pressure of a pipe?
How does fluid mechanics link to physics when its about the liquid phase of chemical processes?
- 5
0
votes
1
answer
99
views
Conceptual Problem in Kinetic Theory of Gas
I came across a question from I.E. Irodov's Physics book:
A tall cylindrical vessel with gaseous nitrogen is located in a uniform gravitational field in which the free fall acceleration is equal to g. ...
- 141
2
votes
2
answers
116
views
Is the entropy of a rotating body largest when the axis of rotation passes through it's centre of mass? [closed]
I am looking for an answer to the observation that a body always rotates about its centre of mass when freely tossed. It can be explained if the entropy is highest in the case when the axis passes ...
- 21
3
votes
2
answers
276
views
Is number density uniform ($n = N/V$) in equilibrium for Boltzmann distribution?
It is often said in the physics papers or textbooks that in equilibrium if there is no external potential then number density is uniform $n = N/V$, where $N$ is number of particles, $V$ is volume. I ...
- 399
2
votes
2
answers
923
views
Calculating coefficient of performance (COP) for Heat Pump
Here I am considering the following cycle;
I know that the coefficient of performance for a heat pump can be calculated by;
$$COP=\frac{Q_h}{W}$$
Where $Q_h$ is the heat exhausted into the hot ...
- 97
0
votes
1
answer
104
views
First principle of thermodynamics vs classical mechanics
please I need clarification about the first principle of thermodynamics, it's general statement is:
$$\Delta U + \Delta \text{KE} + \Delta \text{PE}= W + Q .$$
Supposing that: $ΔU = 0$ and $Q = 0$, ...
0
votes
1
answer
201
views
Line emission spectrum of gases and solids [duplicate]
when a gas like hydrogen is heated it shows discrete line in its emission spectrum but in case of solids we see a continuous spectrum why it is so???i have searched it on internet and some people says ...
- 31
1
vote
2
answers
262
views
Why does mechanical energy transform into heat when there is a loss of energy?
I was studying for a mechanics test, I didn't understand why when there is friction, the energy transforms to a heat. In reality it does, but how can we show it mathematically ?
user262735
0
votes
1
answer
154
views
Is latent heat only released and absorbed as radiation?
Can water simply absord the kinetic energy from colliding air molucules to change its phase?
And can water transformed into ice simply have the kinetic energy of its molecules increased to balance out ...
0
votes
2
answers
100
views
How is macroscopic "volume" of a classical system related to microscopic variables?
In my book it says:
In classical ensemble theory, every macroscopic observable of a system is directly
connected to a microscopic function of the coordinates and momenta of the system.
I can ...
- 147