Which is the smallest of the outer planets?
A. Uranus
B. Jupiter
C. Saturn
D. Neptune
Answer: D
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Satellite Motion: Find the orbital speed of an ice cube in the rings of Saturn. The mass of Saturn is 5.68 × 1026 kg, and use an orbital radius of 1.00 × 105 km. (G = 6.67 × 10-11 N ? m2/kg2)
A. 19.5 km/s B. 27.5 km/s C. 13.8 km/s D. 9.40 km/s
Compared to a bar of pure gold, the density of a pure gold ring is
A) less. B) the same. C) slightly more. D) much more.
How does Rigel, a bluish star, surface temperature compare to Betelgeuse, a reddish star.
A. Rigel's surface temperature is less than Betelgeuse's. B. Rigel's surface temperature is greater than Betelgeuse's. C. They have the same surface temperature because they are both members of the constellation Orion. D. It is impossible to say without knowledge of the sizes of the stars.
A rock is suspended from a scale reads 20.0 N. A beaker of water (having a density of 1000 kg/m3 ) is raised up so the rock is totally submerged in the water. The scale now reads 12.5 N. What is the density of the rock?
A) 2.50 × 103 kg/m3 B) 3.00 × 103 kg/m3 C) 1.60 × 103 kg/m3 D) 2.67 × 103 kg/m3 E) 2.33 × 103 kg/m3