Conduction is heat transfer by which means?

Conduction is heat transfer by which means?

• A. Direct contact between materials
• B. Heat transfer by fluid movement
• C. Heat transfer via electromagnetic waves
• D. Heat transfer during evaporation

Answer: (A)

Direct contact between materials allows heat to flow from the warmer object to the cooler one through molecular interactions and, in metals, freely moving electrons that carry energy quickly. This kind of energy transfer happens without bulk fluid movement or electromagnetic waves, and it continues until temperatures even out or external conditions change. Conduction is the mechanism described by heat moving through touching bodies. In contrast, convection depends on moving fluids to carry heat, radiation travels as electromagnetic waves, and evaporation involves a phase change with latent heat. A familiar example is a metal spoon warming when it sits in a hot pot, with heat traveling along the spoon by contact.

Direct contact between materials allows heat to flow from the warmer object to the cooler one through molecular interactions and, in metals, freely moving electrons that carry energy quickly. This kind of energy transfer happens without bulk fluid movement or electromagnetic waves, and it continues until temperatures even out or external conditions change. Conduction is the mechanism described by heat moving through touching bodies. In contrast, convection depends on moving fluids to carry heat, radiation travels as electromagnetic waves, and evaporation involves a phase change with latent heat. A familiar example is a metal spoon warming when it sits in a hot pot, with heat traveling along the spoon by contact.