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Why is it important to that the solid be dry before the final mass measurement?
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Why is it important to that the solid be dry before the final mass measurement?

User Conengmo
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The force acting between two charged particles A and B is 5.2 x 105 newtons. Charges A and B are 2.4 x 102 meters apart. If the charge on particle A is 7.2 x 108 coulombs, what is the charge of particle B? (k 7 9.0 x 109 newton meters?/coulomb)
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