in not more than 40 words.
1)Distinguish between the Celsius and Fahrenheit scales.
2)when a pan of water is heated on a gas stove, all the water turns hot in a while. How does heat travel through the water?
3) What happen to radiant when it falls on a body? What does the absorption of radiant heat by a body depend on?
4)a) Mention one dillerence between the transfer of heat by conduction and that by radiation .
b) Mention one dillerence between the transfer of heat by conduction and that by convection
Answers
Explanation:
1 Celsius scale, or centigrade scale, is a temperature scale that is based on the freezing point of water at 0°C and the boiling point of water at 100°C. Fahrenheit scale is a temperature scale that is based on the freezing point of water at 32°F and the boiling point of water at 212°F.
2.When the bottom water is heated, it moves up and cold water takes its place at bottom. And the process continues till all water is heated. This process of heating is called convection.
3.When the radiant heat falls on a body, part of it is absorbed and the rest of it is reflected back. The absorption of radiant heat by a body depends on its absorptive, reflective and transitive properties
4.(a)conduction, heat transfer takes place between objects by direct contact. In radiation, heat transfer occurs through electromagnetic waves without involving particles. ... The heat transfer takes place due to the difference in temperature.
(b)Conduction occurs when two bodies (generally solids) are in contact. While Convection occurs in liquids and gases. 2) Conduction is a slow process while Convection is a fast process. 3) In Conduction there is no change of particles while in Convection there is change of particles.