Determine cross-section of the wire
A metal wire carries a current of 100 mA. How long does it take for 2 x 10^20 electrons to pass a given cross-section of the wire?
A. 3.2 s
B. 32 s
C. 320 s
D. 200 s
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A steel ball of mass 0.500 kg is fastened to a cord that is 70.0 cm long and fixed at the far end. The ball is then released when the cord is horizontal. At the bottom of its path, the ball strikes a 2.50 kg steel block initially at rest on a fric
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Three particles, each with a mass of 0.25 kg, are located at ( - 4.0 m, 0), (2.0 m, 0), and (0, 3.0 m) and are acted on by forces , and respectively. Find the acceleration (magnitude and direction) of the center of mass of the system. [Hint: Consi
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How much charge is stored? Answer Q=CV=10x10-9 x 12V=120 nC if the battery is replaced by a 300 V battery, and the capacitor is 2000F, how much charge is stored?
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