Question

Which mode of heat transfer explains why heating vents are best placed near the floor A) conduction
B) convection C) Radiation

Answer 1

Answer:

A) Conduction is the answer

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Answer 2

Explanation:

When air is heated up in the lower levels near the floor, it expands and rises due to its lower density. At the same time, the cooler and more dense air in the upper levels sinks. This creates a continuous air current (convectional current) that warms up the room from the bottom going up, gradually.

Answer: (B)