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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
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.
The formula you are looking for is I = W/E.
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.
Four 100 watt light bulbs or anything else that sums to 400 watts.
Per hour the answer is 400 watt-hours or 0.4 kW-hours (or units).
It will, but only 1.75 decibels louder. The smallest change in loudness that most people can detect is 1 decibel, so the difference between 400 and 600 watts would be barely noticeable.
The solar component for a 10 watt system can be had for under $400 USD.
800 watt should be fine