A standard rain gauge consists of a funnel-shaped collector attached to a long measuring tube. The cross-sectional area of the collector is ____ times that of the tube. Hence, rain falling into the collector is amplified ____ in the tube, permitting measurements of great precision.?
a. ?2; twofold
b. ?4; fourfold
c. ?6; sixfold
d. ?8; eightfold
e. ?10; tenfold
ANSWER: e
Environmental & Atmospheric Sciences
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