vaccum is made between the walls of thermos flask why
Answers
Answer:
The silver coating on the inner bottle prevents heat transfer by radiation, and the role of the vacuum between its wall is to prevents heat moving by convection.
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Answer:
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 reduce heat loss by convection.
B. The glass walls are silver coated to reduce emitted radiation.
C. The flask is designed to prevent heat loss by conduction, convection and radiation.
D. The vacuum between the glass walls prevents heat loss by preventing radiation.
Hint: A vacuum flask or thermos flask is designed so that it will not allow heat loss by any means of conduction or radiation. The vacuum prevents the heat loss by conduction because vacuum is a bad conductor of heat. The stopper prevents the heat loss by convection because it is tightly sealed. And the inner reflecting layer prevents the heat loss by radiat