1. How many electrons make up a charge of 56 nC (nanoCoulomb)? If these are made of copper atoms, how many atoms would there be?
2. What is the magnitude of the electric force of attraction between uranium nucleus and its innermost electron if the distance between them is 8.9x10 pm (picometer)? Express your final answer in scientific notation.
3. A hypothetical plane of equilateral hexagon has six charged particles on each of its vertices. If Q1 has a charge of 7nC (nanoCoulomb) and there is an increasing amount of charge per each vertex by a factor of seven up to Q6, what would be the net force experienced by Q1? Assume that the charge sign alternates from positive to negative, starting on Q1.
* each questions doesnt have correlations to one another.
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