The internal energy of a substance can be increased by

a. doing work on it.
b. letting it do work.
c. adding heat to it.
d. extracting heat from it.
e. none of the above.


a, c

Physics & Space Science

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A pendulum is made with a 4.00 kg mass suspended at the end of a thin rod. The period of the small motion simple harmonic motion is 1.00 sec. What is the length of the thin rod?

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Which of the following statements about hadrons are correct? (There may be more than one correct choice.)

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Physics & Space Science