# Highschool physics problem

1. Apr 18, 2012

### kimkibun

1. The problem statement, all variables and given/known data
2 beakers of water, A and B, initially are at the same temperature. the temperature of the water in A is increased 15°F while at B it increased 15°K. after these temperature changes, which beaker of water has the higher temperature and by how much in °C?

2. Relevant equations

I will use the following conversion formulas for °C

°C=(°F-32)/1.8 (i)

°C=°K-273 (ii)

3. The attempt at a solution

Here's my solution, I'm going to convert the temperature of water beaker A to °C using (i) and for beaker B i will use (ii). is my solution correct?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Apr 18, 2012

### PeterO

The idea of converting the temperatures to Celcius is admirable, but you don't know either temperature, only by how much they changed.

I don't think there is a suggestion that one beaker starts at 15°F while the other starts at 15°K.

Perhaps they both started at 20°C - because they did start at the same temperature.

3. Apr 18, 2012

### kimkibun

thanks for the reply sir! i think, knowing the initial temperature of two beakers is not necessary since what we need to compare is their temperature (in °C) after the said changes.

4. Apr 18, 2012

### PeterO

That is correct, but you were quoting formulas for converting actual temperatures, not converting changes in temperature.

Last edited: Apr 18, 2012