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Spring 2017 College Physics III PHYS 123 homework 1 1. A glass rod is rubbed with silk, giving it a total charge of +10nC. How many electrons or protons were added or removed? How much does the rods mass change, in kilograms, when rubbed by the silk.

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Answer #1

We have the equation Given -10x10-9C e-1.6x1019C 10x109 1.6 x10-19 n 6.25x 1010 The mass change is given by

-б.25x 1010 9.1x10-31 56.875x10-21 Διη-5.69 x 10-20 kg

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