Question

3. Which of the following properties of dark woolen clothes help us to keep
(d) at 0°C
(a) below 33
(d at 370
during winter?
(a) Wool is a poor conductor of heat.
(b) Air is trapped in between the fibres.
(c) It is a good absorber of heat.
(d) All of these
4. Which of the following statement is incorrect?
(a) Dark-coloured surfaces are good absorber of heat.
(b) Light-coloured surfaces are good reflectors of heat.
(c) White or light surfaces are poor absorber of heat.
(d) Both dark-and light-coloured surfaces are good reflectors of heat
5. Which of the given objects is conductor of heat?
(a) Copper
(hl 12​

Answer 1

Answer:

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