A woman who weighs 500 N stands on a 6.0-m-long board that weighs 100 N. The board is supported at each end. The support force at the right end is 3 times the support force at the left end. How far from the right end is the woman standing?
a. 4.8 m b. 2.1 m
c. 1.7 m d. 1.2 m
e. 3.9 m
d
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Because most reflecting surfaces are horizontal, the polarization axes of ordinary sunglasses are
A) vertical. B) horizontal. C) at right angles to each other.
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The earth's northern magnetic pole is located
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