मराठी

Give two examples each of conductors and insulators of heat.

Advertisements
Advertisements

प्रश्न

Give two examples each of conductors and insulators of heat.

थोडक्यात उत्तर
Advertisements

उत्तर

  1. Two examples of conductors of heat are:
    1. Aluminium
    2. Iron
  2. Two examples of insulators of heat are:
    1. Air
    2. water
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Heat - Exercises [पृष्ठ ३४]

APPEARS IN

एनसीईआरटी Science [English] Class 7
पाठ 3 Heat
Exercises | Q 2. | पृष्ठ ३४

संबंधित प्रश्‍न

A wooden spoon is dipped in a cup of ice cream. Its other end ______.


Fill in the blank

A hot metallic piece is placed in tap water contained in a bucket. Heat will flow from _______ to _________


Select the correct alternative

If we add a lump of ice to a tumbler containing water,


Explain briefly the process of heat transfer by radiation.


Give one example of heat transfer by radiation.


What are the modes of heat transfer?


Why are heaters fitted near the floor and air conditioners near the ceiling of a room?


Match the items in column-I to the items in column-II

Column-I Column-II
1. Linear expansion (a) change in volume
2. Superficial expansion (b) hot body to cold body
3. Cubical expansion (c) 1.381 X 10-23 JK-1
4. Cubical expansion (d) change in length
5. Boltzmann constant (e) change in area

Wrap a thin paper strip tightly around an iron rod. Try to burn the paper with candle while rotating the iron rod continuously. Does it burn? Explain your observation.


Take two similar transparent glass bottles having wide mouths. Put a few crystals of potassium permanganate or pour a few drops of ink in one bottle. Fill this bottle with hot water. Fill the other bottle with cold water. Cover the cold water bottle with a thick piece of paper such as a postcard. Press the postcard firmly with one hand and hold the bottle with the other hand. Invert the bottle and place it on top of the hot water bottle. Hold both the bottles firmly. Ask some other person to pull the postcard. Observe what happens. Explain.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×