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How Many Electrons Leave The Battery Per Minute

Sandra Watson
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1.  A 2700 kg block falls vertically through 7.0 m and then collides with a 400 kg pile, driving it 4.0 cm into bedrock. Assuming that the block-pile collision is completely inelastic, find the magnitude of the average force on the pile from the bedrock during the 4.0 cm descent.
______________ N

2. A 9.0-V battery is connected to a bulb whose resistance is 2.1 Ω . How many electrons leave the battery per minute?

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