A toaster oven operating at 800 W of power takes 60 min to bake a potato.
How much energy is this in joules?
How much energy is this in kilowatt-hours?
60 min = 3600 seconds
work = energy in Joules = watts * seconds
800 * 3600 Joules
0.8 kw * 1 hour = .8 kw hr
Hey, you do some now
To calculate the energy used by the toaster oven in joules, we can use the formula:
Energy (in joules) = Power (in watts) × Time (in seconds)
Given that the toaster oven operates at 800 W and it takes 60 min to bake a potato, we need to convert the time to seconds. There are 60 seconds in a minute, so:
Time (in seconds) = 60 min × 60 seconds/min = 3600 seconds
Now, we can calculate the energy:
Energy (in joules) = 800 W × 3600 seconds = 2,880,000 joules
Therefore, the toaster oven uses 2,880,000 joules of energy to bake a potato.
To convert the energy from joules to kilowatt-hours, we need to divide the energy in joules by the number of joules in one kilowatt-hour. Let's proceed with the conversion:
1 kilowatt-hour (kWh) = 3,600,000 joules
Energy (in kWh) = Energy (in joules) / 3,600,000 joules
Energy (in kWh) = 2,880,000 joules / 3,600,000 joules = 0.8 kWh
Therefore, the toaster oven uses 0.8 kilowatt-hours of energy to bake a potato.