- #1
Gaith
- 5
- 0
Homework Statement
Energy can be transmitted via radiation, the rate at which this happens is H=σAT4. A bar of iron is 0.5m long, 0.2m wide and 0.2m high. Iron has a density of 7900 kg/m3, a heat capacity of 400J/kgC, and a coefficent of linear expansion of 1.2x10-5
What is the rate at which iron radiates energy assuming it is initially at 500K and that the emissivity is 0.8?
Homework Equations
H=σAT4
The Attempt at a Solution
I started by trying to figure out the final Temperature so I could plug it into the formula above and get the H. However I am stuck at which equation to use in order to find the final temperature.
Im not sure if I'm going about it the right way either. Help would be greatly appreciated. Thank you