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A fax machine uses 0.105 Amp of current in its normal mode of operation, but only 0.071 Amp in the standby mode. The machine uses a potential difference of 120 V.
(a) In one minute, find how much more charge passes through the machine in the normal mode than in the standby mode?
C
(b) Calculate how much more energy is used?
J
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A skateboarder shoots off a ramp with a velocity of 5.8 m/s,directed at an angle of 54° above the horizontal. The end ofthe ramp is 1.3 m above the ground. Let the x axis beparallel to the ground, the +y direction be verticallyupward, and take as ..
A 14.0-m uniform ladder weighing 510 N rests against a frictionless wall. The ladder makes a 63deg angle with the horizontal. what is the coeffecient of static friction between ladder and ground
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