Respostas

2014-07-23T17:59:40-03:00
Q = - 4.10^-6
d= 2m
k = 9.10^9
E = ?

E = k. \frac{|Q|}{d^{2} }

E = 9.10^{9} . \frac{4.10^{-6}}{2^{2} } =  \frac{36.10^{3} }{4} = 9000  \frac{N}{C}

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