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A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice- water mixture at the other (Eigure 1). The rod consists of a 1.00 m section of copper (with one end in the boiling water) joined end-to-end to a length ₂ of steel (with one end in the ice water). Both sections of the rod have cross-sectional areas of 4.00 cm². The temperature of the copper-steel junction is 65.0°C after a steady state has been reached. Assume that the thermal conductivities of copper W and steel are given by copper = 385 and kistel = 50.2 mK mk Figure Coiling 65.0°C COPPER STEEL -1.00 m-L2- 0000 and water 1 of 1 > Part A How much heat per second (=) flows from the boiling water to the ice-water mixture? Express your answer in watts. ▸ View Available Hint(s) H = 5.39 W ✔ Correct Because the system is assumed to have reached a steady state, the heat flowing out of the boiling water must be equal to the heat flowing through the copper section of the rod. Part B Previous Answers What is the length of the steel section? Express your answer in meters. ▸ View Available Hint(s) Submit Η ΑΣΦΑ L₂-0.19 Previous Answers C X Incorrect; Try Again; 4 attempts remaining ?

A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice- water mixture at the other (Eigure 1). The rod consists of a 1.00 m section of copper (with one end in the boiling water) joined end-to-end to a length ₂ of steel (with one end in the ice water). Both sections of the rod have cross-sectional areas of 4.00 cm². The temperature of the copper-steel junction is 65.0°C after a steady state has been reached. Assume that the thermal conductivities of copper W and steel are given by copper = 385 and kistel = 50.2 mK mk Figure Coiling 65.0°C COPPER STEEL -1.00 m-L2- 0000 and water 1 of 1 > Part A How much heat per second (=) flows from the boiling water to the ice-water mixture? Express your answer in watts. ▸ View Available Hint(s) H = 5.39 W ✔ Correct Because the system is assumed to have reached a steady state, the heat flowing out of the boiling water must be equal to the heat flowing through the copper section of the rod. Part B Previous Answers What is the length of the steel section? Express your answer in meters. ▸ View Available Hint(s) Submit Η ΑΣΦΑ L₂-0.19 Previous Answers C X Incorrect; Try Again; 4 attempts remaining ?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice- water mixture at the other (Figure 1). The rod consists of a 1.00 m section of copper (with one end in the boiling water) joined end-to-end to a length 1₂ of steel (with one end in the ice water). Both sections of the rod have cross-sectional areas of 4.00 cm². The temperature of the copper-steel junction is 65.0°C after a steady state has been reached. Assume that the thermal conductivities of copper W W and steel are given by copper = 385 mrk and steel = 50.2 m-K Figure Boiling water 200 00 65.0°C COPPER STEEL -1.00 mL200 1800 Ice and water 1 of 1 Part A How much heat per second H (= Express your answer in watts. ► View Available Hint(s) H= 5.39 W Submit Part B Previous Answers Correct Because the system is assumed to have reached a steady state, the heat flowing out of the boiling water must be equal to the heat flowing through the copper section of the rod. What is the length I of the steel section? Express your answer in meters. ► View Available Hint(s) ΠΙ ΑΣΦ 2) ) flows from the boiling water to the ice-water mixture? L₂= 0.19 Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining ? m
Transcribed Image Text:A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice- water mixture at the other (Figure 1). The rod consists of a 1.00 m section of copper (with one end in the boiling water) joined end-to-end to a length 1₂ of steel (with one end in the ice water). Both sections of the rod have cross-sectional areas of 4.00 cm². The temperature of the copper-steel junction is 65.0°C after a steady state has been reached. Assume that the thermal conductivities of copper W W and steel are given by copper = 385 mrk and steel = 50.2 m-K Figure Boiling water 200 00 65.0°C COPPER STEEL -1.00 mL200 1800 Ice and water 1 of 1 Part A How much heat per second H (= Express your answer in watts. ► View Available Hint(s) H= 5.39 W Submit Part B Previous Answers Correct Because the system is assumed to have reached a steady state, the heat flowing out of the boiling water must be equal to the heat flowing through the copper section of the rod. What is the length I of the steel section? Express your answer in meters. ► View Available Hint(s) ΠΙ ΑΣΦ 2) ) flows from the boiling water to the ice-water mixture? L₂= 0.19 Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining ? m
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