Recent content by tonyjk

But taking the example of a gas, increasing potential energy is due to increase in kinetic energy right?

So you mean increasing potential energy will increase kinetic energy right?

If we compare two solids A and B ( having the same characteristics i.e same object) , if A is at temperature 1 (T1), having a K.E1 and P.E1. B is at temperature 2 (T2) having a K.E2=K.E1 and P.E2 different to P.E1. This case is possible ? In general : Does variating internal potential energy...

Hello If I take an extreme case, where a body has only an internal potential energy with zero internal kinetic energy, does this body have a temperature? Another question related to it: if two objects A and B having different temperature: A: having only internal potential energy and B having...

Great. So how the temperature of one molecule in statistical mechanics is related to macroscopic temperature (T= dU/dS) of a volume containing this molecule and many others?

No like I said U can theoretically describe both. For example if U can describe one molecule thus the temperature can describe one molecule. So S can describe one molecule? Then if S cannot describe one molecule, a temperature cannot describe one molecule, so there is a contradiction in the U...

Hello, Internal energy can be defined theoretically for one molecule (U = 1/2 Kb T) for example but entropy is defined for a system thus for many molecules. Then we define temperature equal to δU / δS but here U can be defined for one molecule, so S can also be defined for one molecule? How...

When we say that a fluid has a kinetic energy equal to 1/2 M V2 colliding with a solid, usually we talk about the power of the fluid that is equal to 1/2ρAV3 where V is the velocity of the fluid and A is the surface of the solid. My question is: in the quantity ρAV (mass flow rate), all the...

Velocity multiply by surface you will get m3/s so it is a volumetric flow rate. If you multiply by ρ(rho) we will get mass flow rate.

how it is the mass of the volume Av

I am talking about the quantity ρAv

Hello, When a fluid is flowing, it has of course a kinetic energy and thus we can define kinetic power equal to ρAv v is the velocity and A is the surface of a solid for example. I have a question (maybe it is a strange one) : When fluid collides with a solid, do all the molecules collide with...

Thank you.

If the system is isolated then the system will remain unchanged. I asked this question because I am confused about ΔG=0 for both isolated and non isolated system and how in both case the system behaves. If my answer is right (hopefully), I think I've understood it.

Even if the system is isolated, we will have at the end of the process only ice? or the isolated system will remain at equilibrium between liquid/ice?