If the height of an object above a reference level is quadrupled its gravitational potential energy is multiplied by
A. 16
B. 4
C. 1/4
D. 1/16
B. 4, since gravitational potential energy is equal to mgh.
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Mercury is mostly comprised of a large metallic core
a. True b. False Indicate whether the statement is true or false
The Paleozoic era ended with an event called the
a. Chicxulub Impact. b. Cambrian Explosion. c. Great Dying. d. Pangaean Rift.
A circuit consists of an AC audio amplifier, a resistor, and a speaker, all in series. The amplifier puts out an alternating voltage of 16.0 V (rms), the resistance of the resistor is 10.0 ?, and the speaker has a resistance of 11.9 ?. What is the time-averaged power delivered to the speaker?
a. 21.5 W b. 30.5 W c. 6.35 W d. 8.69 W
Atoms heavier than helium were at one time manufactured by
A) photosynthesis. B) thermonuclear fusion. C) radiant energy conversion. D) radioactivity. E) none of the above