The total charge a household battery can supply is given in units of {\ m mA} \\

Question

The total charge a household battery can supply is given in units of { m mA} cdot { m hr}. For example, a 9.0 { m V} alkaline battery is rated 450 { m mA} cdot { m hr}, meaning that such a battery could supply a 1 { m mA} current for 450 { m hr}, a 2 { m mA} current for 225 { m hr}, etc.

How much energy, in joules, is this battery capable of supplying?

Thanks!

Explanation / Answer

Power = Energy / time => E = P * t and that Power = Current * Voltage (P = I * V) Then, combining those equations, the energy the battery can supply is I * V * t Put I = 0.45, V = 9, and t = 3600s (1 hr) THen, 14580J is an answer

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