B. Fill in the blanks.
1. Conduction cannot take place in.....and.....
2. Woollens prevent the.....
to flow out to the cold sorroundings
3. Air is a......
conductor of heat.
4. The mode of transfer of heat which requires no
contact or medium is known as......
5. Heat cannot travel through convection in.....
Answers
Answer:
1. Heat transfer can take place through three different mechanisms: conduction, convection and radiation. In conduction, heat is transferred through direct contact between bodies. ... Hence, convection cannot take place in solids, since the solid particles are not fluid. Thus, convection only takes place in liquids and gases.
2. As wool is a very good insulator and a poor conductor of heat, woolen clothes keep the body warm and protect it from the cold winds. Also, the air trapped between the woolen fibers prevents the flow of heat from the body to the cold surroundings. It also prevents the cold air from coming in contact with the body.
3. Air is a collection of gases, and it is not a good conductor or radiator. Air is excellent at convection, but the amount of heat that can be transferred is minimal because the low mass of the substance cannot store a great deal of heat. Air is used as an insulator in coolers and building walls.
4. It cannot reach us by conduction or convection as there is no medium such as air in most part of the space between the earth and the sun. From the sun the heat comes to us by another process known as radiation. The transfer of heat by radiation does not require any medium.
5. Heat cannot travel by convection through radiation. ... Conduction is the process of heat transfer which takes place in solid.
Explanation:
Please mark as the brainiest answer
Answer:
2. Woollens prevent the heat to flow out to the cold sorroundings
3. Air is a bad conductor of heat.
4. The mode of transfer of heat which requires no
contact or medium is known as radiation
5. Heat cannot travel through convection in solids
Explanation:
I hope it helps you ☺️