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**1. The problem statement, all variables and given/known data**

I have plate of glass pressed between a hot plate on top and a insulating surface below. The idea is to be able to predict the temperature of the glass plate and the thermal gradient through the plate as well at any time. I know the hot plate is at 400 deg F, that it is an 1800 Watt unit, and that the heating surface is 16X20 in. The glass is a 12 inch circle that is 3mm thick. Thermal conductivity of the glass k = 1.2 W/mK and the specific heat capacity c = 0.83 kJ/kgK also the mass of the glass is 521.23g. This problem has me stumped! Any help would be greatly appreciated.

**2. Relevant equations**

I've tried Q/[tex]\Delta[/tex]t = -k

_{t}*A*[tex]\Delta[/tex]T/[tex]\Delta[/tex]x

But doesn't seem to work

**3. The attempt at a solution**