Consider two mercury barometers, one with twice the cross-sectional area of the other. Neglecting capillarity, compared with the wider tube, mercury in the smaller tube will rise
A) to the same height.
B) twice as high.
C) four times as high.
D) more than four times as high.
E) none of the above
Answer: A
Physics & Space Science
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What is the magnitude of the current in the 20-? resistor?
a.
0.75 A
b.
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c.
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d.
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e.
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