# physics

posted by .

If the price of electrical energy is \$0.10 per kilo-watt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degree C?

Can anyone please give me some hints to do it? Thanks a lot!

• physics -

the heat capacity of water is 4190 Joules/kg deg C

1 meter^3 of water is about 1000 kg

so Joules to heat = 4190 J/kg C*1000 *volume in m^3 * change in temp

a Joule is a watt second

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### physics

Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second?
2. ### physics

Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second?
3. ### physics-energy conservation

a mordern power station,or, more correctly, an energy station, converts heat energy into electrical energy at an efficiency od 50% if the station produces electrical energy at a rate of 1.00GW from burning coal, calculate the mass …
4. ### Physics Help Please!

If the price of electrical enegy is \$0.10 per kilowatt *hour, find the cost of using electrical energy to heat the water in a 12.0m * 9.00m * 1.5m swimming pool from 15 degrees C to 27 degrees C. So the change in temperature is 285.15 …
5. ### Physics

If the price of electrical energy is \$0.10 per kilowatt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degrees Celcius?
6. ### Physics/Chemistry

If the price of electrical energy is \$0.10 per kilowatt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degrees Celcius?
7. ### Science

Which of these energy changes takes place in a solar cell?
8. ### Science

What type of energy from the Sun do plants use to make their own food?
9. ### physics

If electrical energy cost 5.00 per kilowatt hour, what will be the daily cost of using a 50 watt bulb for 4 hours a day when connected across a 220 volt source?
10. ### Someone please help me with science?

1. Which of the following shows the correct sequence of energy transformations when listening to the radio?

More Similar Questions