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Results tagged with thermodynamics
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user 34967
Questions relating to the various laws of thermodynamics, transformation or movement of a form of energy to another form, primarily but not limited to heating or cooling of a fluid.
1
vote
Why is pressure not considered in calculation of 'Maximum achievable velocity of a gas'?
Total temperature or stagnation temperature $T_t$ is related to total (stagnation) pressure $P_t$ by the ideal gas law. So you can convert one to the other. But the easiest way to see it is that your …
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2
votes
Is there a way to make an air conditioner without venting heat outdoors?
Theoretically? Sure. From a practical standpoint? No.
At least, it's pretty hard to see that working in any feasible way. Regardless of what you do with the waste heat, you would need an inexhaustib …
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0
votes
I am struggling to get the right answer regarding the quantification of entropy
It's been awhile since I did things like this, but I believe for part (b) you'd find the temperature of the air assuming that $\Delta S = 0$, then find the heat exchange required to go from that state …
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1
vote
how much energy is stored in a car under sun ? (car interior)
You would need to find the specific heat capacity of all the materials inside the car, which might be difficult to get, but as a first estimate you can start with the air in the car. It's specific he …
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1
vote
How to convert car power into energy (MJ) used per km?
Can you not simply take the miles per gallon value times the Heating Value of the fuel?
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