Transfer of thermal energy questions | form three Physics

The temperature of liquid in a thermos flask remains unaltered for a long time because heat loss by
A conduction is minimized
B convection and radiation are reduced
C radiation and convection are minimized
D conduction and radiation are reduced
E all modes of heat transfer are reduced.

Answer / Solution

UNSOLVED

Which process involves heat transfer through gases?

Answer / Solution

UNSOLVED

When the sun shines on the dark-coloured driving wheel of a car, the wheel feels  warm. Why?

1. It is because the sun warms the car by induction.
2. It is because the sun gives energy to the wheel by convection.
3. It is because the sun radiates thermal energy to the wheel.
4. It is because the sun conducts thermal energy to the wheel.
5. It is because the sun conducts thermal energy to the wheel.

Answer / Solution

100. It is because the sun radiates thermal energy to the wheel.