Question

A baking dish is removed from a hot oven and placed on a cooling rack. As the dish cools down to 35 C from 175 C, its net radiant power decreases to 12.0 W. What was the net radiant power of the baking dish when it was first removed from the oven? Assume that the temperature in the kitchen remains at 22 C as the dish cools down.

Answer 1

Answer:

net radiant power is 275.28 W

Explanation:

Given data

net radiant power P(F) = 12 W

initial temperature Ta = 175 °C = 175 + 273 = 448 K

final temperature Tb = 35 °C = 35 + 273 = 308 K

temperature in the kitchen T(f) = 22 °C = 22 + 273 = 295 K

to find out  

net radiant power

solution