Determine the surface charge density on the drum
The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 3.1 x 105 N/C. What is the surface charge density on the drum, assuming that the drum is a conductor?
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Often the experimental factor X is replaced by ln(X) in these quantal assay experiments. Repeat (a) using ln(X) and comment on the fit of these models.
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How long does it take from the moment when the motorcycle starts to accelerate until it catches up with the car? In other words, find t2-t1.
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