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How is the vacuum flask insulated? How does it work?
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Draw a labelled diagram of a thermo flask. Explain how the transfer of heat by conduction, convection and radiation is reduced to a minimum in it.
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Draw a labelled diagram of a thermos flask Describe its working
A thermos flask is designed to prevent the contents of the flask from losing heat. Which of the following statements concerning the design of thermos flasks is incorrect? A. The stopper helps
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Explain Why the space between the two walls in a thermos flask is vacuum?
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Explain the design of a thermos flask.
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Five key facts about glass refill in a vacuum flask
