Q6 a) A 10-cm dia. copper ball is to be heated from 100 *C to till average temperature of 150 °C in 30 min time. The average density is 8950 kg/ m' and the specific heat is 0.395 kJ/kg°C. Find (1) Total amount of heat transfer, (i) Average rate of Heat Transfer, (ii) Average Heat Flux b) A plane wall constructed of solid iron with thermal conductivity 70 W/mC, thickness 50 mm and with surface area 1 m by 1 m, temperature 150 °C on one side and 80°C on the other. Calculate the conductive heat transfer.

Q6 a) A 10-cm dia. copper ball is to be heated from 100 *C to till average temperature of 150 °C in 30 min time. The average density is 8950 kg/ m' and the specific heat is 0.395 kJ/kg°C. Find (1) Total amount of heat transfer, (i) Average rate of Heat Transfer, (ii) Average Heat Flux b) A plane wall constructed of solid iron with thermal conductivity 70 W/mC, thickness 50 mm and with surface area 1 m by 1 m, temperature 150 °C on one side and 80°C on the other. Calculate the conductive heat transfer.

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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Q1) Find the heat transfer rate through a plane wall 20cm thick and 0.1m2 heat transfer area. The temperatures across the wall are 100 "C and 10 C respectively and the thermal conductivity is varies according to the equation (k = 60(1+0.03T)).