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If an electric fan be switched on in a c...

If an electric fan be switched on in a closed room, will the air of the room be cooled? If not, why do we feel cold?

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Assertion : If an electric fan be switched on in a closed room, the air of the room will be cooled. Reason : Fan air decrease the temperature of the room.

Statement- 1 : When an electric fan is switched on in a closed room, the air of the room is cooled. Statement- 2 : When fan is switched on, the speed of the air molecules will increase.

Why dust generally sttles down in a closed room?

SL ARORA-Thermal Properties of Matter-Exercise
  1. Can a given amount of mechanical energy be completely converted into h...

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  2. A match stick can be lighted by rubbing it against a rough surface. Wh...

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  3. If an electric fan be switched on in a closed room, will the air of th...

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  4. Give an example of a process in which no heat is transferred to or fro...

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  5. What is the difference between the specific heat and the molar specifi...

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  6. Why water is preferred to any other liquid in the hot water bottles?

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  7. The coolant in the nuclear reactor is

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  8. Why juice bottles are placed under water in the cold countries ?

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  9. Why is water used as an effective coolant in automobile radiators ?

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  10. What kind of thermal condcutivity , specifie heat and coefficient of e...

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  11. Why do the metal utensils have wooden handles?

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  12. The bird that hibernates in winter is

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  13. Why are two thin blankets are warmer than a single blanket of double t...

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  14. Why are calorimeter made of metal, why not of glass?

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  15. When we step barefoot into an office with a marble floor, we feel cold...

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  16. We can easily boil water in a paper cup. Why?

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  17. A piece of paper wrapped tightly on a wooden rod is found to get charg...

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  18. Woolen cloths are worn in winter but not in summer. Why?

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  19. Stainless steel cooking pans are perferred with extra copper bottoms. ...

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  20. If a drop of water falls on a very hot iron, it does not evaporates fo...

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