Question

I. ANSWER THE FOLLOWING QUESTIONS:
1.Distinguish between reflection of heat and absorption of heat.
2.Clean snow does not melt easily in sunlight. Why?
3.Why cooling fans at the back of a refrigerator are painted black?
4.Give one example of heat transfer by radiation.

II. SOLVE THE NUMERICALS :
1.The temperature of two bodies differ by 10℃ on the Celsius scale. How much will they differ on the i) Fahrenheit scale ii) Kelvin scale ?
2.Convert 10℃ in i) Fahrenheit scale ii) Kelvin scale.
3.The normal temperature of human body is 37℃ . What will be its value on the i) Fahrenheit scale ii) Kelvin scale?

Answer 1

Answer:

Reflection means that they are thrown back from a surface ; absorption means that they are incorporated by a surface and transformed into heat energy