Two people are balanced on a seesaw. If one person leans inward toward the center of the seesaw, that person's end of the seesaw tends to

A) rise.
B) fall.
C) stay at the same level.
D) need more information


Answer: A

Physics & Space Science

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A. south of west B. south of east C. due east D. due west E. north of east

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Why is the southern hemisphere of Mars believed to be older than the northern?

A) The southern hemisphere is darker much like the lunar mare. B) The southern hemisphere is more heavily cratered. C) The northern hemisphere is higher, due to the Tharsis Bulge. D) The northern hemisphere leans more away from the Sun in winter. E) The south polar cap is much thicker than the north one.

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The symbol notation now used for elements was developed by

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