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 91 2 22 6 1.60 10 C 1 Nm 8.99 10 4.89 10 N C 2.17 10 m e ke F r ×  == × = ×   × 7 . The compression of the “spring” is ( ) ( )( ) 68 0.010 0 0.010 0 2.17 10 m 2.17 10 m xr −− × = × , 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 qN e = . The distance separating these charges is , where is Earth’s radius. Thus, 2 E rR = E R ( ) 2 2 9 10 eA E e 2 23 19 2 5 2 2 6 2 10 1.60 10 C 8.99 5.12 10 N C 46 .38 10 m kN F R =  ××  × 6.02 15.8 The magnitude of the repulsive force between electrons must equal the weight of an
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This note was uploaded on 12/09/2011 for the course PHYS 2020 taught by Professor Staff during the Fall '10 term at FIU.

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