A7.0 mm -diameter copper ball is charged to 80 nc . what fraction of its electrons have been removed?

Question:

A7.0 mm -diameter copper ball is charged to 80 nc . what fraction of its electrons have been removed? the density of copper is 8900kg/m^3. show all steps, you.

The unknown number ??

The unknown number ?? $The unknown number ??$...

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A cylindrical container of height 28cm and diameter 18cm is field with water. The water is then poured into another container with

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Can you please help me solve this. Thank you $Can you please help me solve this. Thank you$...

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An electron is moving through a magnetic field of magnitude 9.20 × 10^-4 t. the electron experiences

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My teacher never explained how to do this!

My teacher never explained how to do this! $My teacher never explained how to do this!$...
Please help (use graph to answer questions) $Please help (use graph to answer questions)$...