Advertisements
Advertisements
Question
Why are heaters fitted near the floor and air conditioners near the ceiling of a room?
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
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.
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.
Give one example of heat transfer by radiation.
Conduction of heat takes place through a ______ substance.
What are the modes of heat transfer?
Explain which mode of heat transfer causes sea breezes and land breezes.
Match the items in column-I to the items in column-II
Column-I | Column-II | ||
1. | Linear expansion | (a) | change in volume |
2. | Superficial expansion | (b) | hot body to cold body |
3. | Cubical expansion | (c) | 1.381 X 10-23 JK-1 |
4. | Cubical expansion | (d) | change in length |
5. | Boltzmann constant | (e) | change in area |