Conduction involves energy exchange with direct contact of two materials of different temperatures. What additional effect is associated with high thermal conductivity materials?

Conduction involves energy exchange with direct contact of two materials of different temperatures. What additional effect is associated with high thermal conductivity materials?

• A. They transfer heat faster
• B. They transfer heat slower
• C. They require direct contact with air
• D. They cannot transfer heat

Answer: (A)

Conduction moves energy from hotter to cooler areas through a material, and how quickly that happens depends on the material’s ability to conduct heat, known as thermal conductivity. Materials with high thermal conductivity offer little resistance to heat flow, so when they’re in direct contact with another object at a different temperature, heat travels through them rapidly. That means a high-conductivity material will transfer heat faster than a low-conductivity one. For example, metal gets hot or cool to its surroundings quickly, whereas wood or plastic do so more slowly. The idea that heat transfer would require air contact is incorrect because air is a poor conductor, and conduction occurs mainly through direct contact between materials. Saying they cannot transfer heat is the opposite of what conduction describes.

Conduction moves energy from hotter to cooler areas through a material, and how quickly that happens depends on the material’s ability to conduct heat, known as thermal conductivity. Materials with high thermal conductivity offer little resistance to heat flow, so when they’re in direct contact with another object at a different temperature, heat travels through them rapidly. That means a high-conductivity material will transfer heat faster than a low-conductivity one. For example, metal gets hot or cool to its surroundings quickly, whereas wood or plastic do so more slowly. The idea that heat transfer would require air contact is incorrect because air is a poor conductor, and conduction occurs mainly through direct contact between materials. Saying they cannot transfer heat is the opposite of what conduction describes.