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Two capacitors, C1 = 25 µF and C2 = 3.0 µF, are connected in parallel and charged with a 140 V power supply.
a) Calculate the total energy stored in two capacitors.
b) What potential difference would be required across the same two capacitors connected in series in order that the combination store the same energy as in (a)?
Suppose you want to dertermine the electrical field in acertain region of space. You have a small object of knowncharge and an instrument that measures the magnitude and directionof the force exerted on the object by the electrical field.
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A crate of potatoes of mass 8.0 kg is on a ramp with angle of incline 30° to the horizontal. The coefficients of friction are μs = 0.72 and μk = 0.43. Find the frictional force (magnitude and direction) on the crate if the crate is sliding up t..
You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. Explain how much force must you exert to keep the pole motionless in a horizontal position?
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