Two light bulbs, a thick-filament one and a thin-filament one, are connected in series to a battery. The voltage is greater across the lamp with the
A) thick filament.
B) thin filament.
C) same for both
Answer: B
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A compact disk rotates at 210 revolutions per minute. What is its angular speed in rad/s?
A) 11.0 rad/s B) 22.0 rad/s C) 45.3 rad/s D) 69.1 rad/s E) 660 rad/s
Is the moon accelerated?
A) No, because there is no gravity in space. B) No, because the gravitational force on it is balanced by the centrifugal force. C) Yes, its acceleration is directed forward, along its direction of motion. D) Yes, its acceleration is directed inward toward Earth. E) Yes, its acceleration is directed outward away from Earth.
On September 22 or 23, the noonday Sun is overhead at what latitude?
a. 0° b. 23.5°N c. 23.5°S d. That of the Tropic of Cancer
Two coherent waves reach the same point in phase. One wave has amplitude 8 units and the other has amplitude 6 units. The amplitude of the superposed wave is ______ units.
A. 6 B. 8 C. 10 D. 14 E. 2