an image of hands over an electirc heater

Question

The process shown in the photo is _____

(1 point)
Responses

heat transfer by direct contact.
heat transfer by direct contact.

movement of molecules by conduction.
movement of molecules by conduction.

movement of molecules by vibration.
movement of molecules by vibration.

heat transfer by radiation.

Answer 1

The process shown in the photo is heat transfer by direct contact.

When hands are placed over an electric heater, the heat is transferred through direct contact (conduction) as the warm air from the heater comes in contact with the skin. However, if we consider the general transfer of heat from the heater to the hands without direct contact, it could also be interpreted as heat transfer by radiation, but in the context of hands being placed specifically over the heater, the best answer is heat transfer by direct contact.