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1/ If 1.72 10 20 electrons move through a pocket calculator during a full day's operation, how many coulombs of charge moved through it? _____C

1/ If 1.72 1020 electrons move through a pocket calculator during a full day's operation, how many coulombs of charge moved through it? _____C

2/ Common transparent tape becomes charged when pulled from a dispenser. If one piece is placed above another, the repulsive force can be great enough to support the top piece's weight. Assuming equal point charges (only an approximation), calculate the magnitude of the charge if electrostatic force is great enough to support the weight of a 6.00 mg piece of tape held 1.10 cm above another. (The magnitude of this charge is consistent with what is typical of static electricity.) ______C

3/Common static electricity involves charges ranging from nanocoulombs to microcoulombs.(a)How many electrons are needed to form a charge of

1.90 nC? electrons

(b)How many electrons must be removed from a neutral object to leave a net charge of

0.380 C? electrons

4/A certain lightning bolt moves 49.2 C of charge. How many fundamental units of charge

|qe| is this? _______units of charge |qe|

5/Two point charges exert a 5.60 N force on each other. What will the force become if the distance between them is increased by a factor of 2? ______N

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