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Draw a neat and labeled diagram of a vacuum flask (thermos flask). Explain, how it minimizes loss of heat by preventing conduction, convection and radiation. - Physics

Short Note
Draw a neat and labeled diagram of a vacuum flask (thermos flask). Explain, how it minimizes loss of heat by preventing conduction, convection, and radiation.
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Solution

The flask consists of double-walled glass containers with a vacuum between the walls A and B to prevent heat loss due to conduction and convection as a vacuum is the excellent insulator .to prevent heat loss by radiation, the inner side of the wall A and outer side of wall B is silvered. It has a narrow mouth which is closed by a non-conducting rubber stopper.
Concept: Temperature
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APPEARS IN

Frank Class 9 Physics ICSE
Chapter 5 Heat
Exercise | Q 64 | Page 230
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