The lobes of a radio galaxy can be as much as:
A) dozens of light years from the galaxy's nucleus.
B) hundreds of light years from the galaxy's nucleus.
C) thousands of light years from the galaxy's nucleus.
D) millions of light years from the galaxy's nucleus.
E) billions of light years from the galaxy's nucleus.
D
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Rotational Kinetic Energy: What is the kinetic energy of a 120-cm thin uniform rod with a mass of 450 g that is rotating about its center at 3.60 rad/s?
A. 0.350 J B. 4.20 J C. 0.700 J D. 0.960 J E. 2.10 J
A sprinter runs 100.0 m. If he travels at constant acceleration of 1.95 
for the first 75.0 m and then at constant velocity for the remaining distance, what was his total elapsed time for the whole race?
A. 11.3 s B. 9.8 s C. 10.1 s D. 10.2 s
Evidence that a gas consists mostly of empty space is the fact that:
A. the density of a gas becomes much greater when it is liquefied B. gases exert pressure on the walls of their containers C. gases are transparent D. heating a gas increases the molecular motion E. nature abhors a vacuum
The major source of NOx pollution is
a. combustion for electrical generation. b. industry. c. transportation. d. domestic heating.