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A glass rod with a net charge of 0.402 μC and a small square of silk...

A glass rod with a net charge of 0.402 μC and a small square of silk cloth with a net charge of −0.403 μC, are separated by 12.0 cm. What is the magnitude of the attractive force between the two charged objects? You may approximate both objects as point charges.

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Answer #1

given

q1 = 0.402 μC

= 0.402 x 10-6 C

q2 = - 0.403 μC

= - 0.403 x 10-6 C

r = 12 cm

= 0.12 m

F = k q1 q2 / r2

= 9 x 109 x 0.402 x 10-6 x ( - 0.403 x 10-6 ) / 0.122

F = - 0.10125 N

the magnitude of the attractive force between the two charged objects is F = 0.10125 N

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