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You hold a ruler that has a charge on its tip 4.00 cm above a small piece of tissue paper to see if it

You hold a ruler that has a charge on its tip 4.00 cm above a small piece of tissue paper to see if it can be picked up. The ruler has -10.0 C of charge. The tissue has 5.00 g of mass. What is the minimum charge required to pick up the tissue paper?

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