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प्रश्न
Select the correct alternative
Heat in a liquid is transferred by
पर्याय
conduction
convection
radiation
conduction and radiation
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उत्तर
convection
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Heat transfer in solids is by ______
Fill in the blank
Heat transfer in liquids and gases is by ________.
Select the correct alternative
In the process of convection, heat travel
State the direction of heat transfer by way of convection.
Give one example of heat transfer by radiation.
______ of heat does not require a medium.
Heat is the transfer of energy between two objects at different temperatures.
When a liquid boils, energy is absorbed.
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.
