Transfer of thermal energy questions | form three Physics

White clothes are preferentially worn in sunny regions to black clothes because they:
A. absorb heat
B. diffuse heat
C. reflect heat

D. transmit heat
 

Tobacco leaves being dried outside in an open space receive heat from the sun through a process known as:
A. conduction
B. convection
C. evaporation
D. radiation

If point A is at 100C while point B is at 25 C, then heat energy:
A. is the same at both points A and B
B. will flow from point B to point A
C. will not flow at all
D. will flow from point A to point B

Heat energy can be transferred by the following methods: mention them.

The heat energy from the sun reaches the earth by:
A. Conduction
B. Convection
C. Transparency
D. Radiation

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.

Which process involves heat transfer through gases?

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.

Figure 2 shows a bimetallic thermostat strip used to regulate the temperature of the room by using a heater and a cooler.Which device between A and B is a heater? Justify your answer.

Demonstrate by using a diagram on how heat transfer by convection takes place when water is heated?