Test: MCAT Physical

For the following:

e = 1.60 \times 10^{-19}

k = 8.99 \times 10^{9}

1.

If a charge of magnitude +4e is being held in place 3 nm from a charge of -5e which is also being held in place. What is the potential energy of the system?

-2.5 \times 10^{-19} \textup{J}

1.5 \times 10^{-18} \textup{J}

-1.7 \times 10^{-20} \textup{J}

-1.5 \times 10^{-18} \textup{J}

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