a +2.9-nC free charge is brought to within 3.1 micrometers of a fixed +12-microC charge and...
Homework Answers
By Conservation of energy
KQ1Q2/r = (1/2)mV2
(9*109)(2.9*10-9)(12*10-6)/(3.1*10-6)=(1/2)(0.11*10-3)V2
5.5*10-5V2=101.0322
V=1355.34 m/s
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