Answer :
The evacuated space between the walls of a thermos bottle minimizes heat transfer primarily by eliminating conduction and convection, with reflective coatings also reducing radiation.hence the correct option is c) conduction and convection.
The space between the inner walls of a thermos bottle is evacuated to minimize heat transfer by conduction and convection. The methods of heat transfer include conduction, convection, and radiation. In the case of a thermos, conduction is the process where heat is transferred through direct contact, and convection involves the movement of heat through fluids (liquids or gases).
By creating a vacuum between the walls of the thermos, the bottle effectively eliminates the medium through which conduction and convection can take place. As for radiation, which is the transfer of heat through electromagnetic waves, this can be minimized by using reflective coatings on the surfaces facing the vacuum. Therefore, the correct answer to the question is (c) conduction and convection.
The space between the inner walls of a thermos bottle is evacuated to minimize heat transfer by conduction and convection. Heat transfer can occur through conduction, convection, or radiation. By creating a vacuum gap, the thermos bottle prevents the transfer of heat through conduction and convection, thereby enhancing its insulating properties.hence the correct option is c) conduction and convection.
