A violation of the second law of thermodynamics would occur if
a. a ball lying on the ground spontaneously moved to the top of a desk.
b. an object with low temperature transferred energy in the form of heat to an object with a higher temperature.
c. a motion picture was run backwards through the projector.
d. any of the above occurred.
e. (a) or (b) occurred, but not (c).
e
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What is the temperature of a system in thermal equilibrium with another system made up of ice and water at one atmosphere of pressure?
a. 0°F b. 273 K c. 0 K d. 100°C
A pendulum consists of a 2.0-kg block hanging on a 1.5-m length string. A 10-g bullet moving with a horizontal velocity of 900 m/s strikes, passes through, and emerges from the block (initially at rest) with a horizontal velocity of 300 m/s. To what maximum height above its initial position will the block swing?
a. 32 cm b. 38 cm c. 46 cm d. 27 cm e. 9 cm
A lightbulb is connected to a 120 V(rms), 60 Hz source. How many times per second does the current reverse directions?
A. 60 B. 130 C. 120 D. 30
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