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Question: A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 3.90 μC.
A) What is the potential difference between the plates? Express your answer in kV.
B) If the charge is kept constant, what will be the potential difference between the plates if the separation is doubled? Express your answer in kV.
C) How much work is required to double the separation? Express your answer in mJ.
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A child in danger of drowning in a river is carried downstream by a current that flows uniformly with a velocity of 2.0 meters per second.
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