Consider an object (object A) whose multiplicity is always 1, no matter how much energy you put into it. If you put a very large amount of energy into such an object, and place it into thermal contact with an Einstein solid (object B) having the same number of atoms but much less energy, what will happen?
A. Energy flows from A to B until A has very little energy.
B. Energy flows from B to A until B has very little energy.
C. Energy flows from A to B until both objects have the same energy.
D. No energy will flow between A and B at all.
E. Something else happens (describe).
A. Energy flows from A to B until A has very little energy.
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Velocity Addition: A spaceship leaves Earth at a steady forward speed of 70% the speed of light. How fast relative to the ship must the spaceship launch a shuttlecraft in the forward direction so that it will be moving away from Earth at 98.7% the speed of light?
A. 0.91c B. 0.97c C. 0.93c D. 0.99c E. 0.84c
Which of the following has virtually no effect on the internal structure of a planet?
A) its size B) its composition C) its magnetic field D) its mass
The refrigeration system for an indoor ice rink is to be sized by an HVAC contractor. The refrigeration system has a COP (coefficient of performance) of 0.5. The ice surface is estimated to be –2°C and the ambient air is 24°C. Determine the size of the refrigeration system in kW required for a 110 m diameter circular ice surface.
GIVEN
? Round ice rink
? Diameter (D) = 110 m
? Ice surface temperature (Ts) = – 2°C
? Air temperature (T?) = 24°C
? COP of refrigeration system = 0.5
FIND
? Size of the refrigeration system required
ASSUMPTIONS
? Air is quiescent
? The effects of sublimation are negligible
? Radiation heat transfer is negligible
SKETCH
PROPERTIES AND CONSTANTS
From Appendix 2, Table 28, for dry air at the mean temperature of 11°C
Where will you find a composite volcano?
What will be an ideal response?