energy= power*timeinsecond=1220*60*1.3 Joules
cost=1.22Kw*1.3/60 hr * 12.1 cents/kwhr
With a 1220–W toaster, how much electrical energy is needed to make a slice of toast (cooking time = 1.3 minute)?
At 12.1 cents/kW·h, how much does this cost? (You do not need to enter any units.)
2 answers
1220 Joules/second * 1.3*60 seconds
= 95,160 Joules
1.220 kW * 1.3 min * 1 hr/60 min
= .0264333333333..... kW h
* 12.1 cents = .32 cents
= 95,160 Joules
1.220 kW * 1.3 min * 1 hr/60 min
= .0264333333333..... kW h
* 12.1 cents = .32 cents
1 answer