R

Ruchi Sharma • 9.87K Points
Tutor III Physics 

Q. Drinks remain hot or cold for a long time in a thermos flask because of the

  • (A) presence of air, which is a bad conductor of heat, in between the double walls
  • (B) silver coating on the inside of the double walls
  • (C) vacuum between the double walls
  • (D) combine effects of (b) and (c)
  • Correct Answer - Option(D)
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  • Filed under category Physics

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