28CHAPTER 15 15.54The charges on the spheres will be equal in magnitude and opposite in sign. From 22eFkqr=, this charge must be ()24239221.0010 N1.00 m1.0510C8.9910 N mCeFrqk−×⋅===××⋅The number of electrons transferred is 315191.0510C6.59101.6010Cqne−−×=××The total number of electrons in 100-g of silver is 250 g2.6210=23electronsatoms1 mole47 6.021010atommole107.87 gN=××Thus, the fraction transferred is 1510256.59102.51 102.6210nN−×××(that is, 2.51 out of every 10 billion). 15.55452cos2.0010 N C6.00 m3.00 mcos10.03.55CEEAθΦ=°=× ⋅
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