Question

Electricity goes about $0.05 Kilowatt hr, in form of electricity how many joules can you get for a dollar?

Answer 1

Energy(Joules)=Power(watts)*time(seconds)
1Kilowatthour= 1*1000*3600 Joules
1000*3600 Joules per $0.05
so for 1 $ we'll get 1000*3600/0.05 Joules
=72000000 Joules or 72 Mega Joules or 72 million joules

Answer 2

Thanks ash!!