# Homework Help: Time to heat

1. Apr 9, 2009

### Jason03

the problem im working on asks to find how long it would take to heat 52 gallons of water in a hot water heater if 4800 watts is being used and the temperature needs to be raised from 60 F to 120 F....

My work is below...

http://i674.photobucket.com/albums/vv106/jason03_2009/hw1.jpg

Last edited: Apr 9, 2009
2. Apr 9, 2009

### Staff: Mentor

I'm not used to working in those units, but your approach looks sound. Did you get the correct answer? If not, try converting into mks units, and re-calculating to see what answer you get.

3. Apr 9, 2009

### Jason03

Yea im used to SI units as well...I just worked with the units given since the conversions were given....I guess I could try it the other way to if I did it correctly

4. Apr 9, 2009

### Redbelly98

Staff Emeritus
Is the water 52 pounds or 52 gallons?

5. Apr 9, 2009

### Jason03

good call....its 52 gallons.. but I did the correct conversion in my calculations...

6. Apr 9, 2009

### Redbelly98

Staff Emeritus
7. Apr 9, 2009

### Jason03

Thanks!...Just checking to see if it was right....

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