All the following statements are true. Which one follows directly from Kepler's third law (p2 = a3)?
A) Venus orbits the Sun at a slower average speed than Mercury.
B) Venus is more massive than Mercury.
C) Venus takes longer to rotate than it does to orbit the Sun.
D) Venus has a thicker atmosphere than Mercury.
A
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A current of 2.0 A in the 100-turn primary of an ideal transformer causes 14 A to flow in the secondary. How many turns are in the secondary?
A) 700 B) 4 C) 114 D) 14
Relative Velocity: A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 s. During this swim, she is swept downstream 480 m. How fast can she swim in still water?
A. 0.50 m/s B. 0.80 m/s C. 1.2 m/s D. 1.4 m/s E. 1.8 m/s
Current estimates place the age of the universe at about
A) 10 billion years. B) 10 million years. C) 14 billion years. D) 4-1/2 billion years.
Spectral analysis of Titan's atmosphere indicates that it consists mainly of ________.
A. nitrogen B. hydrogen and helium C. oxygen D. carbon dioxide