The impossibility of reaching a temperature of absolute zero is incorporated in
a. the third law of thermodynamics.
b. the first law of thermodynamics.
c. the second law of thermodynamics.
d. an increase in entropy.
a
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General Questions: If you pound a feather with a hammer, which one feels a greater force?
A. always the feather B. always the hammer C. The size of the force is always exactly the same on both of them. D. If the feather moves, then it felt the greater force. Otherwise the force was the same on both.
The temperature coefficient of resistivity of platinum is 3.9 × 10-3/C°. If a platinum wire has a resistance of R at a temperature of 23°C, to what temperature must it be heated in order to double its resistance to 2R?
A) 730°C B) 280°C C) 300°C D) 930°C
In this figure a time sequence shows one complete cycle for the vibration of an object on a spring. How would the equilibrium position of the object change if its mass were increased?
a. It would go up. b. It would go down. c. It would remain the same.