Question: A conductive disk whose diameter is 8 cm is charged up. A speck of dust has a charge of - 0.1 nC and a mass

A conductive disk whose diameter is 8 cm is charged up. A speck of dust has a charge of - 0.1 nC and a mass of 1 microgram and is 0.2 cm away from the disk. If the dust speck accelerates away at

a = 1200 m/sec^2. What is the charge on the disk? Q= _______________C

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