Four 1.5-volt AA batteries in series power a transistor radio. If the batteries hold a total charge of 200 C, how long will they last if the radio has a resistance of 200 ??
a. 6.0 h
b. 1.9 h
c. 2.6 h
d. 1.4 h
e. 2.4 h
b
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What percentage of the solar nebula's mass consisted of rocky material?
A) 0 percent B) 0.4 percent C) 2 percent D) 20 percent E) 80 percent
Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.The work you do is __________
Fill in the blank(s) with correct word
The internal energy of a monatomic ideal gas is equal to which of the following?
a. (3/2)PV b. (3/2)nT/V c. 3 T/P d. none of the above
The general heliocentric model proposed by Copernicus was appealing, and eventually became preferred, because
A. it explained why we do not observe stellar parallax. B. it was more aesthetically pleasing than the complicated Ptolemaic model. C. it made more accurate predictions than the Ptolemaic model. D. it replaced Earth with the Sun as the center of the solar system.