Question

Use of thermos flask
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Answer 1

Answer:

This is a Vacuum Flask: It is also known as a thermos. It's used to keep cool things cool, and hot things hot. Such as hot coffee, or cold water.

Answer 2

Answer:

➡️A thermos is a container that is used to keep items—usually food or drinks—hot or cold over a period of time.

➡️It uses thermal insulation to prevent or inhibit the transfer of thermal energy from one area to another.

➡️There's virtually no way heat can escape from a vacuum flask and a hot drink stored inside will stay steaming hot for several hours.

➡️The sealed stopper stops heat getting in by convection; the vacuum stops conduction, and the metal lining between the outer case and the inner chamber stops heat radiating in either.

Hope it helps you dear........❤️❤️❤️