The most striking "cloudmark" in Jupiter's atmosphere is the:
A) Great Dark Spot.
B) Cassini Division.
C) Great Red Spot.
D) Black Hole.
E) Brown Dwarf.
C
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A shopping cart moves with a kinetic energy of 40 J. If it moves at twice the speed, its kinetic energy is
A) 40 J. B) 80 J. C) 160 J. D) not enough information
A football player leaps at 3.0 m/s toward a second football player, who is at the time of the collision moving at 0.5 m/s toward the first player. After the collision, the two players move together at 1.2 m/s. If the originally stationary player's mass is 175 kg, what is the other's mass?
A. 185 kg B. 119 kg C. 165 kg D. 68 kg
Why are planetary magnetic fields important?
A. They protect the planet from impacts. B. They help prevent the loss of a planet's atmosphere. C. They counteract tidal forces. D. They keep the planet rotating.
Among the points and circles shown on this diagram, which one(s) have varying right ascension?
A) the celestial equator and the ecliptic B) Earth's equator and the celestial equator C) only the celestial equator D) the north and south celestial poles