Which has the greatest mass?
A) a fluffed-up king-size pillow
B) a scrunched-up king-size pillow
C) an automobile battery
D) all about the same
Answer: C
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Compared to noise, musical sounds have
A) periodic tones. B) musical notes. C) both of these D) neither of these
The wavelength of any particle with wave characteristics, such as electrons and neutrons, is given by the _________relationship that equates the wave and particle momentum.
Fill in the blank(s) with the appropriate word(s).
A copper pipe is held vertically and a magnet is dropped down the pipe. The magnet is oriented with the north pole down. What direction do the Eddy currents flow as viewed from above the pipe? If copper bar of approximately the same size and weight is dropped down the tube will it fall faster or slower?
A. CCW above the magnet and CW below the magnet; copper bar will fall slower B. CCW above the magnet and CW below the magnet; copper bar will fall faster C. CW above the magnet and CCW below the magnet; copper bar will fall slower D. CW above the magnet and CCW below the magnet; copper bar will fall faster
An athlete doing push-ups performs 650 kJ of work and loses 425 kJ of heat. What is the change in the internal energy of the athlete?
A) -225 kJ B) -1075 kJ C) 1075 kJ D) 225 kJ E) 276 kJ