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Electricity goes about $0.05 Kilowatt hr, in form of electricity how many joules can you get for a dollar?
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a joule is a watt times a second, so we have\[$1\times\frac{10^3W\text{hr}}{$0.05}\times\frac{3600s}{\text{hr}}\]will give us watt-seconds=joules
So my answer is 7.2 x 10^7 J is that right?
seems that way
Thanks!
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