Question

Two chairs (A and B) are in an empty room overnight. Chair A is made of steel while chair B is made of wood. In the night and in the morning, the temperature of the room is 290 K. In the morning, a person chooses between Chair A and Chair B as the seat by feeling (touching) the chair and choosing one which feels warmer.

• A. BLANK-1: Chair A, Chair B, neither chair
• B. BLANK-2: metal, wood, air, human body
• C. BLANK-3: higher, lower, different, same
• D. BLANK-4: heat capacity, heat conductivity, electrical resistance

Hint:

Heat conductivity determines how easily heat flows from a material to the skin. Metals typically have higher thermal conductivity than wood.

Answer 1

The Correct Option is A

Chair A, made of steel, feels warmer because it has higher heat conductivity than Chair B made of wood. Since both chairs are at room temperature (290 K), Chair A will transfer heat more efficiently to the person, making it feel warmer when touched.