- #1

Cheddar

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## Homework Statement

A metal (doesn't say what metal) is in a heater that is set to 700 K.

If the temperature of the ball is 900 K then the rate of heat loss = 0.10 J/min.

What is the rate of heat loss when the ball's temperature = 800 K.

The ball's emissivity doesn't change appreciably with temperature.

## Homework Equations

Q = emissivity * Boltzman Law * Temperature (to the 4th power in K) * Area * time

## The Attempt at a Solution

I solved for A using the given information then plugged it into the equation above to solve for Q/t using 800 K instead of the 900 K. My answer doesn't check out. Am I suppose to convert 0.10 J/min into J/seconds? If so, how?