Applications to Astronomy: The appearance of the great range of brightness among stars is due to
A. only to the differences in the amount of light different stars emit.
B. only to the differences in the distances of stars from us.
C. both of these differences indicated.
D. None of these answers.
Answer: C
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Rotational Kinetic Energy: A solid sphere and a solid cylinder, both uniform and of the same mass and radius, roll without slipping at the same forward speed. It is correct to say that the total kinetic energy of the solid sphere is
A. more than the total kinetic energy of the cylinder. B. less than the total kinetic energy of the cylinder. C. equal to the total kinetic energy of the cylinder.
What is wave interference, and the two types of wave interference?
What will be an ideal response?
Point charges q and Q are positioned as shown. If q = +2.0 nC, Q = ?2.0 nC, a = 3.0 m, and b = 4.0 m, what is the electric potential difference, VA ? VB?
a.
8.4 V
b.
6.0 V
c.
7.2 V
d.
4.8 V
e.
0 V
The electric field associated with a uniformly charged hollow metallic sphere is the greatest at:
a. the center of the sphere. c. infinity. b. the sphere's outer surface. d. the sphere's inner surface.