50. •• A copper teakettle has a circular bottom 30.0 cm in diameter that has a uniform thickness of 2.50 mm. It sits on an electric burner whose temperature is 150 °C.

(a) If the kettle contains water at its boiling point, what is the rate of heat conduction through its bottom? (b)
Assuming that the heat from the burner is the only heat input, how much water is boiled away in 5.0 min?
Is your answer unreasonably large? If yes, explain why.