Which of the following features is used to minimize heat loss due to conduction in a thermo - flask?
A. The space between the two walls of the vacuum flask is evacuated B. The vacuum flask is separated from the outer wall with corks C. The surfaces of the vacuum flask are silvered. D. The inner and outer walls of the flask are made of steel
Correct Answer: A
Explanation
In a themoflask, The cork reduces heat loss by conduction and evapori1.1.1. the vacuum reduces heat loss by convection and conduction since they both require material medium. Lastly, the silvered surface reduces heat loss by radiation.
