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9_Ch 15 College Physics ProblemCH15 Electric Forces and Electric Fields

# 9_Ch 15 College Physics ProblemCH15 Electric Forces and Electric Fields

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Electric Forces and Electric Fields 9 15.6 The attractive force between the charged ends tends to compress the molecule. Its magnitude is ( ) ( ) ( ) 2 19 2 2 9 1 2 2 2 6 1.60 10 C 1 N m 8.99 10 4.89 10 N C 2.17 10 m e k e F r × = = × = × × 7 . The compression of the “spring” is ( ) ( ) ( ) 6 8 0.010 0 0.010 0 2.17 10 m 2.17 10 m x r = = × = × , so the spring constant is 17 9 8 4.89 10 N 2.25 10 N m 2.17 10 m F x × = = = × × k 15.7 1.00 g of hydrogen contains Avogadro’s number of atoms, each containing one proton and one electron. Thus, each charge has magnitude A q N e = . The distance separating these charges is , where is Earth’s radius. Thus, 2 E r R = ( ) ( ) E R ( )( ) ( ) 2 2 9 10 e A E e = × 2 23 19 2 5 2 2 6 2 10 1.60 10 C N m 8.99 5.12 10 N C 4 6.38 10 m k N F R = × × = × × 6.02 15.8
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