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Two equally charged particles, held 4.0 × 10-3 m apart, are released from rest. The initial...

Two equally charged particles, held 4.0 × 10-3 m apart, are released from rest. The initial acceleration of the first particle is observed to be 5.5 m/s2 and that of the second to be 9.0 m/s2. If the mass of the first particle is 7.8 × 10-7 kg, what are (a) the mass of the second particle and (b) the magnitude of the charge of each particle?

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