A quark can have a charge of
A) -3/2 e.
B) -e/2.
C) -1/3 e.
D) -e/4.
E) -3/4 e.
C
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The average value of 
t for a complete cycle is
A. 1. B. 0. C. 0.707. D. 0.500. E. 0.250.
Simple Harmonic Motion: If the amplitude of the motion of a simple harmonic oscillator is doubled, by what factor does the maximum speed of the oscillator change?
A. 2 B. 4 C. It does not change. D. 1/2 E. 1/4
Most of the extrasolar planetary systems discovered to date are
A) very similar to our own solar system with inner rocky terrestrial planets and outer gaseous Jovian planets B) similar to our solar system in having inner rocky terrestrial planets but different in having no Jovian planets C) identical to our own with the same number and types of planets as our own solar system D) quite different than our own solar system, many with Jovian planets found close to their parent stars
In 1987, the best refrigerator being sold used 515 kWh/yr and the average used 979 kWh/yr. How much money would have been saved on your electric bill between then and 2000 by buying the more efficient one?
What will be an ideal response?