Advertisements
Advertisements
Question
Why are heaters fitted near the floor and air conditioners near the ceiling of a room?
Advertisements
Solution
Room heaters are fitted near the floor because this allows the hot air near the heater to rise up and warm the entire room.
The air conditioners are fitted near the ceiling so that the cold air from the AC takes the place of hot air rising up from the bottom. In this way, the entire room gets cooled.
RELATED QUESTIONS
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.
Medium is necessary for the transfer of heat by radiation.
Select the correct alternative
If we add a lump of ice to a tumbler containing water,
Why is the freezing chest in a refrigerator fitted near its top?
The earth receives heat from the sun by ______.
Why is the outer coat of the penguins of Antarctica black?
Heat is the transfer of energy between two objects at different temperatures.
When a liquid boils, energy is absorbed.
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.
