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Unformatted text preview: Chapt. 22 Electric Charge 177 a) Given that coppers atomic mass is 63 . 5 in atomic mass units (i.e., in units of 1 . 66 10 27 kg), how many copper atoms are there in the penny? HINT: If you have 10 kg of eggs and each egg weighs 50 g, then you how many eggs? b) Given that a copper atom has 29 protons (i.e., atomic number Z=29), how much gross positive charge in Coulombs does the penny have? c) Imagine (contrafactually as they say in Washington) that the absolute value of the elementary proton charge was 1 . 000001 times larger than the absolute value of the elementary electron charge (i.e., there was a fractional charge difference of ( e/e ) = 10 6 ), what would be the force between two pennies a distance 1 meter apart assuming that the pennies would be neutral if there were no fractional charge difference. d) Is a charge difference between proton and electron of the order suggested in the part (c) question likely? Explain....
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This note was uploaded on 11/16/2011 for the course PHY 2053 taught by Professor Buchler during the Fall '06 term at University of Florida.
 Fall '06
 Buchler
 Physics, Charge, Mass

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