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8 A copper hot-water cylinder of length 1-0 m and radius 0-20 m is lagged by 20m of material of thermal conductivity 0-40 W m K. Estimate the temperature df the outer surface of the lagging, assuming heat loss is through the sides only, if hear has to be supplied at a rate of 0-25 kW to maintain the water at a steady temperature of 60°C.

8 A copper hot-water cylinder of length 1-0 m and radius 0-20 m is lagged by 20m of material of thermal conductivity 0-40 W m K. Estimate the temperature df the outer surface of the lagging, assuming heat loss is through the sides only, if hear has to be supplied at a rate of 0-25 kW to maintain the water at a steady temperature of 60°C.

Elements Of Electromagnetics
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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8 A copper hot-water cylinder of length 1-0m and radius 0-20 m is lagged by 20m of material of thermal conductivity 0-40 W m K. Estimate the temperature of the outer surface of the lagging, assuming heat loss is through the sides only, if hear has to be supplied at a rate of 0-25 kW to maintain the water at a steady temperature of 60°C. Assume that the temperature of the inside surface of the lagging is 60 C. (L) 9 A double-glazed window consists of two panes of glass each 4 mm thick senantad
Transcribed Image Text:8 A copper hot-water cylinder of length 1-0m and radius 0-20 m is lagged by 20m of material of thermal conductivity 0-40 W m K. Estimate the temperature of the outer surface of the lagging, assuming heat loss is through the sides only, if hear has to be supplied at a rate of 0-25 kW to maintain the water at a steady temperature of 60°C. Assume that the temperature of the inside surface of the lagging is 60 C. (L) 9 A double-glazed window consists of two panes of glass each 4 mm thick senantad
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