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A particle with a charge of 2 microcoulombs is fixed in place. A second particle with...

A particle with a charge of 2 microcoulombs is fixed in place. A second particle with a charge of -4 microcoulombs is released from rest at a distance of 10 cm from the 2-microcoulomb charge. What is the kinetic energy of the -4 microcoulomb charge the instant it has moved a distance of 5 cm from the release point?

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