Respostas

2013-09-16T21:48:02-03:00
A)
E = F / q
6*10^5 = F / 2*10^-6
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F = 12*10^-1 = 1,2N
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b)

E = F/q
6*10^5 = F / 3*10^-6
F = 18 * 10^-1
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F = 1,8N
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2013-09-17T18:18:06-03:00

E = F / q
6*10^5 = F / 2*10^-6
**************************
F = 12*10^-1 = 1,2N