The formation of which of the following is not directly caused by erosive wave action?
a. Wave-cut cliffs
b. Sea stacks
c. Pocket beaches
d. Sea caves
c
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Because of its high mean density and magnetic field, Mercury's large core must be made chiefly of ________
Fill in the blank(s) with correct word
In an isolated system of two bodies that exert gravitational forces on one another, the quantity (quantities) that remain(s) constant is(are)
A. the total energy of the system. B. the total angular momentum of the system. C. the angular positions of the two bodies. D. all of the above. E. only (a) and (b) above.
An ice skater performs a pirouette (a fast spin) by pulling in his outstretched arms close to his body. What happens to his moment of inertia about the axis of rotation?
A) It does not change. B) It decreases. C) It increases. D) It changes, but it is impossible to tell which way.
A drop in pressure is an indication of
A) an approaching cold front. B) orographic lifting. C) adiabatic expansion. D) a stationary front.