a) Figure 11 shows how an underground room was ventilated. It had two vents, one at A and the other at B. A fire was lit at point C.

      

a) Figure 11 shows how an underground room was ventilated. It had two vents, one at A and the other at B. A fire was lit at point C.
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Explain what happened to the ventilation when the fire was lit
b) Explain how a vacuum flask minimizes loss of heat through radiation.

  

Answers


John
a) The air around C was heated and began to rise up (expand), going out through A. The fresh and cold air came in to replace it through vent B and so the room gets ventilated

b) The double walls are silvered to minimize any radiation
johnmulu answered the question on April 17, 2017 at 08:31


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