LONG ANSWER TYPE QUESTIONS
1. Define conduction. What are the conditions for the conduction of heat ?
2. What are conductors and insulators of heat? Give two examples of each.
3. Why is heat transfer by convection possible only in liquids and gases? How are land breeze and sea
breve caused?
4. Deline radiation and radiant heat. Show by a simple experiment that black bodies are good heat absorber
than white bodies.
5. Mention the precautions to be taken while reading a thermometer to measure temperature.
and the
Answers
Answer:
1.Conduction of heat can be defined as the movement of heat energy from a high temperature to a lower temperature. The conditions for conduction of heat are. - The bodies must be in direct contact with each other for the transfer of heat by direct conduction.
2.Conductors conduct electrical current very easily because of their free electrons. Insulators oppose electrical current and make poor conductors. Some common conductors are copper, aluminum, gold, and silver. Some common insulators are glass, air, plastic, rubber, and wood.
3.Convection is a type of heat transfer that can only happen in liquids and gases, because it involves those liquids or gases physically moving. ... It is caused by the difference in the rates of heating between the land and the ocean. The bigger the difference in temperature, the stronger the wind.
4.i don't know about that
5.Precautions while using clinical thermometer - definition
Do not wash the thermometer with hot water. Ensure that before use the mercury level is below 35 ∘C. Read the thermometer keeping the level of mercury along the line of sight. Handle the thermometer with care, as you handle any glass articles.
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Answer:
define conduction what are the conditions for the conduction of heat