Advertisements
Advertisements
प्रश्न
Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation.
Advertisements
उत्तर
- Convection is taking place in boiling water.
- The heat coming into the stove is coming by conduction.
- The heat around the stove and utensils is coming from radiation.
APPEARS IN
संबंधित प्रश्न
A wooden spoon is dipped in a cup of ice cream. Its other end ______.
Stainless steel pans are usually provided with copper bottoms. The reason for this could be that ______.
Write true or false for a given statement.
On touching a lump of ice, we feel cold because some heat passes from our body to the ice.
Select the correct alternative
Heat in a liquid is transferred by
Select the correct alternative
The vacuum kept in between the walls of a thermos flask reduces the heat transfer by
Maximum heat is absorbed by a ______ coloured object.
Heat is the transfer of energy between two objects at different temperatures.
When ice changes into a liquid, it absorbs energy.
When a liquid boils, energy is absorbed.
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.
