If the voltage on a capacitor is doubled, then the energy stored by the capacitor
A)
quadruples.
B)
doubles.
C)
halves.
D)
stays the same.
E)
triples.
A
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Exhibit 14-1
A square of side 
is removed from one corner of a square sandwich that has sides of length L. The center of mass of the remainder of the sandwich moves from C to C'.
?
?
Use this exhibit to answer the following question(s).
Refer to . The displacement of the x coordinate of the center of mass (from C to C') is
A.
.B.
.C.
.D.
.E.
.Find the average density of a white dwarf star if it has a mass equal to that of the Sun (2.0 × 1030 kg) and a radius equal to that of the Earth (6.4 × 106 m).
A. 9.0 × 106 kg/m3 B. 1.8 × 107 kg/m3 C. 1.8 × 109 kg/m3 D. 3.6 × 1010 kg/m3 E. 9.0 × 107 kg/m3
A sound source of 100 watts radiates sound uniformly in all directions. The intensity of the sound at a distance of 4.00 m is
A. 0.301 
B. 0.353
C. 0.497
D. 0.535
E. 0.621
Halos are most often observed in the ____________ time of the year
a. spring b. summer c. fall d. winter