(600 watts) x (12 hours per day) = 7.2 kilowatt-hours per day
5 days 12 hours = 5.5 days19,800 / 5.5 = 3,600 watt-hours per day = 150 watts
It depends on the wattage, Hours = Watt - Hours / Watts
Watt hour is a measurement of energy use, something that's pulling one watt during one hour. Tera is a multiplier, 1x10^18, so it's either something pulling one watt for that many hours, or it's something pulling that many watts for one hour or something inbetween.
Typical home energy cost is 10 cents per kilowatt hour A 60 watt bulb running for one hour uses 60 watt hours .10 X (60/1000) = .006 cents per hour 16.66 60watt bulbs on for one hour would cost 10 cents.
1 kilowatt equals 1000 watts. An 80 watt solar panel under ideal conditions produces as you might guess 80 watts. So under ideal conditions it would take 12.5 hours for the panel to produce 1000 watts. (1000/80=12.5)
5 days 12 hours = 5.5 days19,800 / 5.5 = 3,600 watt-hours per day = 150 watts
A 30-watt bulb uses 0.03 kilowatt-hours every hour, or 30 kilowatt-hours in 1000 hours. To find the kilowatt-hours, multiply 0.03 by the time in hours.
-9900
2300 watt-hours for every hour it operates. Watts x Hours = watt hours.
0.6 kW times 18 hours = 10.8 kWh.
Depends on what the cows were doing!
The idea is to divide the energy by the power used. First, convert the units to make them consistent. For example, you might convert kilowatt-hours to watt-hours.
In ten hours, a 200W bulb will use: 10 * 200 = 2000 Watt-hours = 2 kwh
Running a power of 60 watts for one hour uses 60 watt-hours of energy. If you run it for two hours, that would be 120 watt-hours. Running a 60 watt appliance for 16 hours and 20 minutes is 1000 watt-hours, or 1 kWh, also called one Unit.
60 watt-hrs= 60 watt*1 hr so it will take 1 hour.
two 40 watt bulbs in 24 hours use: 2*40*24 watt hours in practical uses, kilowatt hours are used divide by 1000 to change the units thus two 40 watt bulbs in 24 hours use 1.92 kilowatt hours
The bulb uses 7.5 watt-hours each hour, or 90 watt-hours if left on for 12 hours. 1 unit of electricity would be used in 11 days at 12 hours per day.