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Why are hollow bricks used in the construction of cold storage rooms?

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Question

Why are hollow bricks used in the construction of cold storage rooms?
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Solution

Brick is a bad conductor of heat, hence bricks greatly reduce the conduction of heat from outside to the room. In order to ensure better insulation, bricks are made hollow so that air-filled between these gaps provides insulation to heat.
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Chapter 5: Heat - Transmission of Heat [Page 226]

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Frank Physics [English] Class 9 ICSE
Chapter 5 Heat
Transmission of Heat | Q 13 | Page 226
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