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2
votes
2answers
140 views
Thermal expansion is an expression of which conservation laws?
Many objects get larger as they heat up and contract as they cool down. Which conservation laws are applied to describe this phenomenon? How do they interact with each other to produce this effect?
2
votes
1answer
152 views
How to express the heat capacity in terms of heat?
The first law of thermodynamics divides the internal energy change into contributions of heat and work.
$$\text dU=\omega_Q-\omega_W,$$
Here I chose the notation to emphasise that the two parts are ...
3
votes
1answer
124 views
In a Sterling Engine, does heat from the hot side transfer to the cold side?
A Sterling Engine is a closed system. The "hot" side oscillates between higher temperature with higher pressure and lower temperature with lower pressure. Does Nature switch back and forth between ...
2
votes
1answer
841 views
Heat Flux and Spatial Temperature Gradients
The derivation for Heat Equation I am reading starts by stating
Net change of heat inside $[x,x+\Delta x]$ = Net flux of heat across boundaries + Total heat generated inside $[x,x+\Delta x]$ and ...
-3
votes
3answers
280 views
Is the continuous transformation of energy from one form to another one free? Or it consumes some quantity of who knows what?
Sorry for the unclarity. I probably created some bias in your mind having tagged my question with energy-conservation and conservation-laws.
I simply consider that, relatively independently of ...
