Posted by Dave on Tuesday, April 6, 2010 at 2:51pm.
You're not going to get an answer here, I've tried this site, and everytime, I get the wrong answer or no one responds.
The change in temperature is 12 deg C if it rises from 15 to 27 degrees.
1. Find the mass of water from volume of water times its density.
2. Find the heat in Joule needed from Q=mct where m is mass of water, c is specific heat capacity and t is rise in temperature.
Then the cost.
3. One kilowatt hour is
1000W x 60(min) X 60(sec) Joules.
4. Then find how many of these you need to heat that water.
5. Each one costs $0.1
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