charles law

You should do your own homework.

What?! And give up show biz?

Kelvin or Rankine

http://en.wikipedia.org/wiki/Charles%27s_law

I'm hot.

Kelvin temperature conversion formulae from Kelvin to Kelvin
Celsius [°C] = [K] − 273.15 [K] = [°C] + 273.15
Fahrenheit [°F] = [K] × 9⁄5 − 459.67 [K] = ([°F] + 459.67) × 5⁄9
Rankine [°R] = [K] × 9⁄5 [K] = [°R] × 5⁄9
For temperature intervals rather than specific temperatures,
1 K = 1 °C = 1.8 °F = 1.8 °R
Comparisons among various temperature scales