_____________ is a very long and deep canyon on Mars
a. Valles Marineris
b. Ishtar Terra
c. Tharsis Bulge
d. Lobate Scarp
e. Phobos
a
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Consider two less-than-desirable options. In the first you are driving 30 mph and crash head-on into an identical car also going 30 mph
In the second option you are driving 30 mph and crash head-on into a stationary brick wall. In neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. Which of these two situations would result in the greatest impact force? A) hitting the brick wall B) hitting the other car C) The force would be the same in both cases. D) We cannot answer this question without more information. E) None of these is true.
What do we mean by the frost line when we discuss the formation of planets in the solar nebula?
A) It is another way of stating the temperature at which water freezes into ice. B) It is a particular distance from the Sun, beyond which the temperature was low enough for ices to condense. C) It marks the special distance from the Sun at which hydrogen compounds become abundant; closer to the Sun, there are no hydrogen compounds. D) It is the altitude in a planet's atmosphere at which snow can form.
As a basketball player starts to jump for a rebound, he begins to move upward faster and faster until he leaves the floor. During this time that he is in contact with the floor, the force of the floor on his shoes is:
a. bigger than his weight. b. equal in magnitude and opposite in direction to his weight. c. less than his weight. d. zero.
The safest place in the home to seek shelter from a tornado is the
a. basement. b. kitchen. c. bedroom. d. attic.