What is the change in entropy when 1 kg of ice melts at 0°C is (in J/K)? (LF,ice = 333 J/g.)

A. 335.
B. 603.
C. 1220.
D. 1310.
E. 2160.


Answer: C

Physics & Space Science

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A. The Universe would be about 7 billion yrs old. B. The Universe would be about 30 billion yrs old. C. It would have no effect on our estimates of the Universe's age. D. The Universe would be about 130 billion yrs old. E. None of these choices is correct.

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Doubling both charges changes the potential energy for a pair of point charges by a factor of

A. 2. B. 4. C. 1?2. D. 1?4. E. 1 (no change).

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Light behaves like

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Work is done when

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