# Lightning Bolt

Lightning occurs when there's a flow of electric charge (mainly electrons) between a cloud and the ground. Assume that the rate of charge flow in a lightning bolt is about $$20~\mbox{kC/s}$$ and that it lasts for $$100~\mu\mbox{s}$$. How many electrons flow between the ground and the cloud in this time?

Details and assumptions

The charge of the electron is $$e=1.6 \times 10^{-19}~\mbox{C}$$.

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