Advertisements
Advertisements
प्रश्न
Explain the following:
In a solid, heat is not transferred by the process of convection.
Advertisements
उत्तर
In the process of convection heat is transferred from one point to another by actual movement of particles of medium and particles of solid cannot move so the process of convection is not possible in case of solids.
APPEARS IN
संबंधित प्रश्न
Two substances A and B have specific heats c and 2 c respectively. If A and B are given Q and 4Q amounts of heat respectively, the change in their temperatures is the same. If the mass of A is m, what is the mass of B?
When a substance having mass 3 kg receives 600 cal of heat, its temperature increases by 10°C. What is the specific heat of the substance?
A copper wire 10 cm long is heated from 200C to 300C. Find the increase in length of the wire, if coefficient of linear expansion of copper is 1.7 X 10-5oC-1
Convert the following temperature into Fahrenheit scale:
-400C
Give a scientific reason for the following:
On a hot sunny day, it is advisable to wear light coloured clothes.
The following figure shows a rectangular box with two tubes P and Q at the top. A burning candle R is placed under the tube P. The candle burns brightly.

Explain:
(i) How is the air in the box circulating?
(ii) What will happen if the opening Q is closed?
______ determines the direction of the flow of heat.
