How many kWh of energy does a 550 W toaster use in the morning if it is in operation for a total of 8 min?
At a cost of 12 cents/kWh, how much would this add to your monthly electric energy bill if you made toast four mornings per week? (Assume a month of 4 weeks.)
At a cost of 12 cents/kWh, how much would this add to your monthly electric energy bill if you made toast four mornings per week? (Assume a month of 4 weeks.)
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Power (kW) x Time (hours) = Electrical Energy (kW-hour)
0.55 x (8/60) = 0.073 kW-hr
Let's assume there are 4 weeks per month.
0.073 x 4 x 4 = 1.173 kW-hr
1.173 x 12 = 14.08 cents
0.55 x (8/60) = 0.073 kW-hr
Let's assume there are 4 weeks per month.
0.073 x 4 x 4 = 1.173 kW-hr
1.173 x 12 = 14.08 cents
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a Watt is power in electrical units
Energy = Power * time
Joule energy = 1 watt * sec
a kilowatt hour is 1000 watts for one hour which is a big unit (lots of joules)
energy costs money
power is how fast we use that energy
Energy = Power * time
Joule energy = 1 watt * sec
a kilowatt hour is 1000 watts for one hour which is a big unit (lots of joules)
energy costs money
power is how fast we use that energy
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That amounts to $.002 per KWminute, times 32 minutes per month = $.064 per monthly electric bill.