Question

In a vacuum flask, which methods of heat transfer are prevented by the vacuum?
A) Conduction only
B) Convection only
C) Conduction and convection only
D) Conduction, convection and radiation

Answer 1

Answer:

conduction and convection only

Explanation:

So, option c) is the right answer.

Answer 2

In a vacuum flask, both Conduction and Convection of heat transfer are prevented by the vacuum. Option(C) is the correct answer.

• Conduction and convection stop heat exchange across vacuum in a vacuum flask.
• Conduction cannot transfer heat in this situation because it requires direct contact for heat transfer and there is a vacuum between the two layers.
• Likewise, energy is dissipated through convection when liquid molecules are moving.
• But because there is a suction between the two layers, the kinetic energy of the molecules is insufficient. Convection is therefore not possible in this situation.
• There is almost no heat flow from the inner wall to the outer wall by convection when there is so little air between the walls.

For information on conduction and convection, refer to the following answers:

https://brainly.in/question/24035750

https://brainly.in/question/5732297

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