B8 One end of a solid cylindrical copper rod 0.2500 m longand 0.0350 m in radius is inserted into a large block afsolid hydrogen af its melting temperalure, 13.84 K. Theother end is blackened and exposed to thermal radiationfrom surrounding walls at 450.0 K. (Some telescapes inspace employ a similar setup. A solid refrigerant keepsthe telescope very cold-required for proper operation-even though it is exposed to direct sunlight.) The sides ofthe rod are insulated, so no energy is łost or gainedexcept at the ends of the rod. See the sketch in (Figure1)(a) When equilibrium is reached, what is the temperatureof the blackened end? The thermal conductivity of copperat lemperatures near 20 K iş 1670 W/m K. (b) Atwhat rale (in kg/h) does the solid hydrogen melt?EXECUTEFigure1 of 1->Part GSolve for the temperature of the blackened end of the rod.Express your answer in kelvins.Solid hydrogen, mHyd*28> View Avallable Hint(s)Copper eylinder,THot = 14.19 KTu13.84 KSub7.Tc Part HUse your result from the previous part to tind the rate at which the hydrogen melts.Express your answer in kilograms per hour.• View Available Hint(s)?dmulya/dt =kg/hSubmitPrevious Answers

Answered: Image /qna-images/answer/bf8b52ae-f598-4fd3-8f48-8d97d3749979.jpg

One end of a solid cylindrical copper rod 0.2500 m long and 0.0350 m in radius is inserted inta a large block af solid hydrogen af its melting temperalure, 13.84 K. The other end is blackened and exposed to thermal radiation from surrounding walls at 450.0 K. (Some telescopes in space employ a similar setup. A solid retrigerant keeps the telescope very cold-required for proper operation- even though it is exposed to direct sunlight.) The sides of the rod are insulated, so no energy is lost or gained except at the ends of the rod. See the sketch in (Figure 1) (a) When equilibrum is reached, what is the temperature of the blackened end? The thermal conductivity of copper at lemperatures near 20 K is 167o W/m. K. (b) At what rale (in kg/h) does the solid hydrogen melt? EXECUTE Figure 1 of 1 > Part G Solve for the temperature of the blackened end of the rod. Express your answer in kelvins. Solid hydrogen, myyd > View Available Hint(s) 2R Copper cylinder THaa = 14.19 K T13.84 K Sub

One end of a solid cylindrical copper rod 0.2500 m long and 0.0350 m in radius is inserted inta a large block af solid hydrogen af its melting temperalure, 13.84 K. The other end is blackened and exposed to thermal radiation from surrounding walls at 450.0 K. (Some telescopes in space employ a similar setup. A solid retrigerant keeps the telescope very cold-required for proper operation- even though it is exposed to direct sunlight.) The sides of the rod are insulated, so no energy is lost or gained except at the ends of the rod. See the sketch in (Figure 1) (a) When equilibrum is reached, what is the temperature of the blackened end? The thermal conductivity of copper at lemperatures near 20 K is 167o W/m. K. (b) At what rale (in kg/h) does the solid hydrogen melt? EXECUTE Figure 1 of 1 > Part G Solve for the temperature of the blackened end of the rod. Express your answer in kelvins. Solid hydrogen, myyd > View Available Hint(s) 2R Copper cylinder THaa = 14.19 K T13.84 K Sub

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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