Advertisements
Advertisements
Question
Select the correct alternative
If we add a lump of ice to a tumbler containing water,
Options
heat flows from water to ice
heat flows from ice to water
heat flows from water to ice if water is more
heat flows from ice to water if ice is more
Advertisements
Solution
heat flows from water to ice
APPEARS IN
RELATED QUESTIONS
Give two examples each of conductors and insulators of heat.
Look at Figure. Mark where the heat is being transferred by conduction, by convection and by radiation.

Write true or false for a given statement.
Liquids are heated by conduction and radiation.
Write true or false for a given statement.
Black surfaces are the poor absorbers of heat radiations.
Select the correct alternative
The vacuum kept in between the walls of a thermos flask reduces the heat transfer by
State the direction of heat transfer by way of convection.
Why is the freezing chest in a refrigerator fitted near its top?
Give one example of heat transfer by radiation.
Take a sheet of paper. Draw a spiral on it as shown in Figure. Cut out the paper along the line. Suspend the paper as shown in Figure above a lighted candle. Observe what happens. Think of an explanation.

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.
