Physics, 21.01.2020 05:31, bossefamily1

Anegative charge of -0.550 μc exerts an upward 0.900-n force on an unknown charge that is located 0.300 m directly below the first charge. part a what is the value of the unknown charge (magnitude and sign)? express your answer with the appropriate units.

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Anegative charge of -0.550 μc exerts an upward 0.900-n force on an unknown charge that is located 0....