Household water heaters use a 240 V rather than a 120 V source. What is the resistance of a water heater's heating element if it heats 40 gallons (151 kg) of water from 15 C to 60 C in 15 min
P = IV
P = I^2R
I = dq/dt
The Attempt at a Solution
Honestly no clue. If anyone can give me some hints I would really appreciate this.
So far I have electrical units, V, and then I have kg, Celcius, and seconds. I'm not sure how the given equations help me relate the units at all.
I need current and power, but those units do not help me at all.
I know I = dq/dt, and I thought 45 C / 900 s looks very similar to current but the units don't make sense to me...