A spark of man-made 10 million volt lightning had an energy out-put of 1.25 `xx` 10 watt sec. How many coulombs of charge flowed?
1.25 `xx` 1012 Coulomb
1.25 `xx` 10-6 Coulomb
1.25 `xx` 105 Coulomb
1.25 `xx` 107 Coulomb
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