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A wall of a room has dimensions of 6m xx...

A wall of a room has dimensions of `6m xx 4m`. It is 60 cm thick. Its thermal conductivity is is 2. If the temperature inside and outside is `20^@C` and `-5^@C` respectively the amount of heat conducted every hour is about

A

2000 J

B

1700 kcal

C

2000 cal

D

1500 cal

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CHETANA PUBLICATION-THERMAL PROPERTIES OF MATTER-EXERCISE
  1. The temperature gradient of a rod of length 1 m is 60^@C//m. If the te...

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  2. The thermal conductivity of a metal plate is 80 w//mk. If the thicknes...

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  3. A wall of a room has dimensions of 6m xx 4m. It is 60 cm thick. Its th...

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  4. A body cools from 62^@C to 50^@C in 10 minutes. If the surrounding tem...

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  5. A body cools from 51^@C to 50.9^@C in 10 sec. If surrounding temperatu...

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  6. The cooling curve is represented by graph.......... A B C D

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  7. Gravitation plays a role in..... A. conduction B. convection C. rad...

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  8. Three different liduid A , B, C of equal masses have temperatures of ...

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  9. The MKS unit of thermal resistance is

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  10. A 10^@ temperature difference is maintained across the two faces of a ...

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  11. The dimension of thermal resistance are.............

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  12. The relation between alpha and beta is

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  13. The temperature and pressure at the triple point of water are

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  14. Iron sheet 50 cm X 20 cm is heated through 100^@C. If prop = 12 xx 10^...

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  15. What are the important characteristics of a thermometer?

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  16. Define thermal capacity?

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  17. State Newton's law of cooling?

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  18. Define (i) Sublimation

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  19. Define(ii) Triple point

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  20. Give any four applications of thermal conductivity in everyday life.

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