Advertisements
Advertisements
Question
No medium is required for transfer of heat by the process of ______.
Advertisements
Solution
No medium is required for transfer of heat by the process of radiation.
APPEARS IN
RELATED QUESTIONS
Fill in the blank
Heat transfer in liquids and gases is by ________.
Why is the freezing chest in a refrigerator fitted near its top?
Explain briefly the process of heat transfer by radiation.
What are the modes of heat transfer?
Why is the outer coat of the penguins of Antarctica black?
Why are heaters fitted near the floor and air conditioners near the ceiling of a room?
When ice changes into a liquid, it absorbs energy.
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 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.
