# A Christmas light is made to flash via the discharge of a capacitor. T

A Christmas light is made to flash via the discharge of a capacitor. The effective duration of the flash is 0.21 s (which you can assume is the time constant of the capacitor), during which it produces an average 35 mW from an average voltage of 2.85 V.
How much charge, coulombs, moves through the light?
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Raymond Foley

Write the expression for current in terms of power and voltage.
$I=\frac{P}{V}$
Current is defined as the rate of flow of charge.
$I=\frac{Q}{t}$
Q=It
Q=(P/V)t
Substitute values in equation