Question

on a camping trip, bobby got his dads permission to try a recipe for baking a potato away from moving parts. after their drive, the potato was ready to eat. cooking a potato with engine heat is an example of a transfer of thermal energy by expansion convection conduction radiation

Explanation:

• Expansion: This is a physical change related to the increase in volume of a substance due to temperature rise, not a mode of heat transfer. So it's not the answer.
• Convection: It involves the transfer of heat through the movement of fluids (liquids or gases). In the case of cooking a potato with engine heat, there is no significant fluid movement facilitating the heat transfer in the classic sense of convection.
• Conduction: It is the transfer of heat through direct contact between materials. When using engine heat to cook a potato (assuming the potato is in direct or near - direct contact with engine parts that are hot), heat is transferred from the hot engine parts to the potato through direct molecular interaction (conduction).
• Radiation: It is the transfer of heat in the form of electromagnetic waves. Engine heat cooking a potato is not primarily through the emission and absorption of electromagnetic waves in the way that, for example, the sun heating the Earth is radiation.

Answer:

C. conduction