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A parallel-plate air capacitor has a capacitance of 940 pF. The charge on each plate is 2.10 µC.
(a) What is the potential difference between the plates?
V
(b) If the charge is kept constant, what will be the potential difference between the plates if the separation is doubled?
(c) How much work is required to double the separation?
J
A circular saw blade completes 1200 revolutions in 40 rm s while coasting to a stop after being turned off. Assuming steady deceleration, what are (a) angular deceleration and (b) initial angular speed.
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