2. Multiple choice questions:

A. Heat radiation can pass through
i. Vacuum
ii. Air
iii. Transparent screen
iv. All of these

B. The loss or gain of heat is prevented in a thermos flask by
i. Radiation
ii. Convection
iii. Conduction
iv. All of these

C. During melting of ice, its temperature:
i. Remains constant
ii. Increases
iii. Decreases
iv. None of these



Answer :

Final answer:

Heat transfer methods include conduction, convection, and radiation.


Explanation:

Conduction is heat transfer through stationary matter by physical contact, like a stove transferring heat to a pan. Convection is the transfer of heat by the movement of a fluid, as seen in weather systems. Heat transfer by radiation involves electromagnetic radiation, such as warming by the Sun or thermal radiation from the human body.


Learn more about heat transfer methods here:

https://brainly.com/question/40278739