What is the approximate diameter of the disk of the Milky Way?
A) 100 light-years
B) 1000 light-years
C) 10,000 light-years
D) 100,000 light-years
E) 1,000,000 light-years
D) 100,000 light-years
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What is the CNO cycle?
A) a set of steps by which four hydrogen nuclei fuse into one helium nucleus B) the process by which helium is fused into carbon, nitrogen, and oxygen C) the process by which carbon is fused into nitrogen and oxygen D) the set of fusion reactions that have produced all the carbon, nitrogen, and oxygen in the universe
Give some examples of simple harmonic motion:
a. Mass and spring b. pendulum c. light d. a and B
The pressure at the bottom of a geyser is
A) less than nearer the top. B) the same as nearer the top C) greater than nearer the top. D) all of the above E) none of the above
The pin at A in Problem 3.7 is removed and the pole rests on a rough surface at A in the position shown in the figure below. The minimum coefficient of friction at A required for equilibrium is:
(A) 0.41
(B) 0.25
(C) 0.37
(D) 0.64
