A heat pump can

A) cool an environment.
B) warm an environment.
C) both of these
D) neither of these


Answer: C

Physics & Space Science

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The unit kilowatt-hour is a unit of

A) energy. B) momentum. C) power. D) time.

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A 10-kg dog is runnng with a speed of 5.0 m/s. What is the minimum work required to stop the dog in 2.40 s?

A) 125 J B) 50 J C) 75 J D) 100 J

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The magnetic force on a charged particle moving at a constant speed in a uniform magnetic field will be doubled when the angle between the velocity of the particle and the direction of the magnetic field changes from 25.0° to

a. 57.7°. c. 12.2°. b. 12.5°. d. 50.0°.

Physics & Space Science