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heart transfer A wall of a building is made up of 8cm of brick (k= 0.069W/mC),2cm of celotex (k=0.048W/mC) and 2cm of an asbestos board

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A wall of a building is made up of 8cm of brick (k= 0.069W/mC),2cm of celotex (k=0.048W/mC) and 2cm of an asbestos board (k=0.74W/mC). Glass wool (k=0.038W/mC) is to be added between the celotex and asbestos in order to reduce the heat flow rate through the wall by 50%. Determine the thickness of the glass wool. 8

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