Saturn's atmosphere
a. has more distinctive zones and belts than Jupiter's.
b. is rich in free oxygen.
c. is hazy above the clouds.
d. is all of the above
e. is none of the above
C
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A nuclear reaction, which gives off a total of 2.0 × 10^16 J of energy, expends how much mass in the process? (c = 3.00 × 10^8 m/s)
a. 2.2 kg c. 22 kg b. 180 kg d. 0.22 kg
In the leftmost photo below, an instructor demonstrates that a standard two-by-four on a curved dish can be rotated by the attractive force of a charged rod. The two-by-four is affected by the charged rod of the same way as:
a. the metal ball in the figure 20-3. b. the insulating object in the figure at above right. c. neither of the two; a different mechanism is involved since the two-by-four is so massive.
Beyond the frost line of the solar system, temperatures were low enough for
A) metals to condense into solid form. B) rocks to condense into solid form. C) hydrogen compounds to condense into solid ices. D) asteroids to form. E) hydrogen and helium to condense into ice.
Which of the following are dwarf planets?
A. Uranus and Neptune B. Eris and Uranus C. Pluto and Eris D. Neptune and Pluto E. Mercury and Eris