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State Newton's law of cooling?...

State Newton's law of cooling?

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A body cools in 7 minute from 60^@C to 40^@C . What time does it take to cool from 40^@C to 28^@C if the surrounding temperature is 10^@C ? [Assume that Newton's law of cooling is valid.]

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What is "Newton's law of cooling"? Explain.

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Ac cording to Newton's law of cooling, the rate of cooling of a body is proportional to (Delta theta)^(n) , where Delta theta is the difference of the temperature of the body and thae surrounding. What is the value of n out of 4,3,2,and 1?

A body cools from 50^@C to 49.9^@C in 5 s. How long will it take to cool from 40^@C to 39.9^@C ? [Assume the temperature of surroundings to be 30^@C and Newton's law of cooling to be valid]

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CHETANA PUBLICATION-THERMAL PROPERTIES OF MATTER-EXERCISE
  1. Three different liduid A , B, C of equal masses have temperatures of ...

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  2. The MKS unit of thermal resistance is

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

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  4. The dimension of thermal resistance are.............

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  5. The relation between alpha and beta is

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

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

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  8. What are the important characteristics of a thermometer?

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  9. Define thermal capacity?

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  10. State Newton's law of cooling?

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  11. Define (i) Sublimation

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  12. Define(ii) Triple point

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

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  14. Why do we consider two specific heats heat for a gas?

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  15. In a random temperature scale, water boils at 200^@ X and freezes at 2...

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  16. A sheet of brass 50 cm long and 8cm broad at 0^@C. If the surface area...

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  17. Distinguish between: What is the difference between heat and tempera...

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  18. The difference in temperature between two sides of a glass plate 0.3 m...

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  19. Define molar specific heats of a gas? State their relation with princi...

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  20. A metal sphere cools from 80^@C to 60^@C in 6 minutes. How much time w...

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