How did the relatively smooth regions on the Moon known as the lunar maria form?
A) Large impacts fractured the Moon's lithosphere, allowing lava to fill the impact basins.
B) The early bombardment created heat that melted the lunar surface in the regions of the maria.
C) Volatiles escaping from the Moon's interior heated and eroded the surface in the regions of the maria.
D) The giant impact that created the Moon left smooth areas that we call the maria.
E) The maria are the result of gradual erosion by micrometeorites striking the Moon.
A) Large impacts fractured the Moon's lithosphere, allowing lava to fill the impact basins.
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A. 4.3 mV B. 0 mV C. 1.5 mV D. 1.7 mV E. 5.5 mV
As a proton moves in the direction the electric field lines
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a. 0.51 kJ b. 0.29 kJ c. 0.80 kJ d. 0.13 kJ e. 20 kJ
Conservation of Momentum: A very elastic rubber ball is dropped from a certain height and hits the floor with a downward speed v. Since it is so elastic, the ball bounces back with the same speed v going upward. Which of the following statements about the bounce are correct? (There could be more than one correct choice.)
A. The ball had the same momentum just before and just after the bounce. B. The magnitude of the ball's momentum was the same just before and just after the bounce. C. The ball's momentum was conserved during the bounce. D. None of these statements are correct.