# science

posted by
**barbara**
.

How do i calculate how much time it takes to heat water?

All I know is the power supplied and the energy required.

Thanks

power= energy/time

Power*time= energy

you know the energy, you know the power, solve for time.

time(in seconds)= energyinjoules/powerinwatts.

so if the energy is 17640000J and the power is 156w it should take 113076 seconds

Thanks alot

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