Consider a small pot with a copper base. The base has a thickness of 2.0 mm and a diameter of 15 cm. Water in this pot is boiling at 100 °C. Heat transfer rate is estimated at 250,000 J/s. Assume that heat enters the water only from the bottom of the pot through the copper base. Find the temperature of the heating element on which the copper bottom rests.

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter28: Current And Resistance
Section: Chapter Questions
Problem 58PQ
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Consider a small pot with a copper base. The base has a thickness of 2.0 mm and a diameter of
15 cm. Water in this pot is boiling at 100 °C. Heat transfer rate is estimated at 250,000 J/s.
Assume that heat enters the water only from the bottom of the pot through the copper base. Find
the temperature of the heating element on which the copper bottom rests.
200 720
Transcribed Image Text:Consider a small pot with a copper base. The base has a thickness of 2.0 mm and a diameter of 15 cm. Water in this pot is boiling at 100 °C. Heat transfer rate is estimated at 250,000 J/s. Assume that heat enters the water only from the bottom of the pot through the copper base. Find the temperature of the heating element on which the copper bottom rests. 200 720
A sample of Uranium ore is estimated to have originally contained 805 mg of uranium-238.
Analysis reveals the sample to currently contain 775 mng of uranium-238. What is its estimated
age?
Half-life of Uranium-238 is 4.468 x 10^9 yrs.
Radioactive Uranium Ore.
Transcribed Image Text:A sample of Uranium ore is estimated to have originally contained 805 mg of uranium-238. Analysis reveals the sample to currently contain 775 mng of uranium-238. What is its estimated age? Half-life of Uranium-238 is 4.468 x 10^9 yrs. Radioactive Uranium Ore.
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