What concepts can be explain using this diagram?
a) the movement of water between the oceans and the land
b) how precipitation ends up in rivers or groundwater
c) how weathering causes the seas to become saltier
d) all of these
Answer: d) all of these
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________ are hot compact stars whose mass is comparable to the Sun's and size to Earth's.
A. Neutron stars B. Pulsars C. White dwarfs D. Black holes
Kirkwood gaps in the asteroid belt occur at distances where
A) the density of asteroids is high enough for a large collision to pulverize a number of asteroids. B) the period of an orbiting asteroid would be a simple fraction (like 1/3 or 1/4 ) of Jupiter's orbital period. C) the period of an orbiting asteroid would be the same as Mars's orbital period. D) the orbit would take the asteroid beyond the "frost line" in the solar system. E) the period of an orbiting asteroid would be the same as Jupiter's orbital period.
A billiard ball collides in an elastic head-on collision with a second stationary identical ball. After the collision which of the following conditions applies to the first ball?
a. maintains the same velocity as before b. has one half its initial velocity c. comes to rest d. moves in the opposite direction
Which of the following boxes represents a suspension?
A) Only A represents a suspension. B) Only B represents a suspension. C) Only C represents a suspension. D) Each of these could represent a submicroscopic portion of a suspension.