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.
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
If a 12V battery supplies a 13A current how do I work out the Power supplied