Which of these features is attributed to the shrinking of Mercury's core?
A) rilles
B) scarps
C) craters
D) mare
E) rays
B
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What theoryexplains the movement of the continents on Earth's surface?
a. continental spreading b. continental drift c. continental tectonics d. continental rifting e. continental rise
A river flows due east at 2.0 m/s. A boat crosses the 300-m-wide river by maintaining a constant velocity of 15 m/s due north relative to the water. If no correction is made for the current, how far downstream does the boat move by the time it reaches the far shore?
a. 80 m b. 30 m c. 25 m d. 40 m e. 50 m
A compound formed from atoms from the far left and the far right of the periodic table is probably a(n) ______________ compound
Fill in the blank(s) with correct word
Which has greater momentum in this photo: the non-moving ship or the kayak moving at the slow speed of 1 meter in ten seconds?
a. The ship because of its overwhelmingly greater mass. b. The kayak because it has non-zero momentum while the ship at rest must have zero momentum. c. The momentum of an object is a meaningless concept if an object is not moving, so there is no clear answer to this question. d. The two momenta cannot be compared, because they point in different directions. e. Their momenta are equal.