About one watt of heat. A 1500 watt heater will warm a 400 square foot room in the winter months. one watt is a very small volume of heat.AnswerHeat is measured in joules. A watt is equivalent to a joule per second. So your answer is that a watt produces one joule of heat every second.
Gee, Maybe a 5X80, 10X40, 20X20 or about any combination thereof. lc
The formula you are looking for is I = W/E.
To calculate a cost in kW/h a time interval has to be stated. How long is the 400 watt heater going to be on in a 24 hour period. You also have to state what you are being charged from the utility power company per kW/h.
According to some of the answers given here, and the mathematics involved in wattage, it seems to be that one watt equals 14.5°.Why? Because you can cram 1009 people into an 1809 sq ft room. You can heat a 400 sq ft room with a 1500w heater. Human Body temperature is 98.6°.
It will power two 400 watt lamps.
1 Joule is 1 Watt-Second. 1 Watt Hour is 3600 Watt-Second or 3600 Joules. 400 Watt-Hours is 1440000 Joules.
To convert 400 Watt hours to BTU, you need to multiply by 3.412 to get the energy in BTU. So, 400 Watt hours is equivalent to approximately 1364.8 BTU.
ummm...4(?) is this a trick question?
Per hour the answer is 400 watt-hours or 0.4 kW-hours (or units).
The solar component for a 10 watt system can be had for under $400 USD.
800 watt should be fine