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What is the magnitude of an electric field that balances the weight of a plastic sphere...

What is the magnitude of an electric field that balances the weight of a plastic sphere of mass 4.6 g that has been charged to -3.0 nC?

What is the magnitude of an electric field that balances the weight of a plastic sphere of mass 4.6 g that has been charged to -3.0 nC?

3.2×106 N/C
1.7×106 N/C
4.6×106 N/C
1.5×107 N/C
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