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What is heat?...

What is heat?

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Heat is that form of energy which causes the sensation of hotness or coldness.
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SUBHASH PUBLICATION-THERMAL PROPERTIES OF MATTER-FOUR MARKS QUESTIONS AND ANSWERS
  1. What is heat?

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  2. Show that R=8.314 Jmol^(-1)K^(-1)

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  3. If the coefficient of linear expansion of iron is 1.20xx10^-5K^(-1) a...

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  4. Given that molar specific heats of gas at' constant pressure and volum...

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  5. Two metal rods made up of iron (K1=79Wm^(-1)K^(-1)) and brass (K2=109W...

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  6. The thickness of a brick wall is 0.25m. The temperatures inside and ou...

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  7. Find the amount of heat required to convert 10 kg ice at -10^(@)C to w...

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  8. A body cools from 80^(@)C to 50^(@)C in 5 minutes. Calculate the time ...

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  9. A cubical ice box of thermocol has each side 30 cm and thickness 5 cm ...

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  10. A brass boiler has a base area of 0.15m^2 and thickness 1 cm. It boils...

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  11. Estimate the temperature on the surface of the Sun from the following ...

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  12. A body cools from 80^(@)C to 50^(@)C in 5 minutes. Calculate the time ...

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  13. Sun emits maximum radiant energy at 5461A and Moon at 10mum. If the su...

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  14. Luminosity of a distant star is 16000 times that of the Sun. If the su...

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  15. The thickness of a filament wire is 0.15 mm and length 10 cm. The fila...

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  16. A small cavity of diameter 2 mm whose temperature is 3000K acts as a b...

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  17. Two vessels of different materials are identical in size and wall thic...

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  18. At what rate a layer of ice will be formed if the surrounding temperat...

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  19. Initial ice layer on a pond is 10 mm. What time will it take to form a...

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  20. One end of a thick copper rod is immersed into a steam chamber and the...

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  21. If the thermal conductivity of the material of a conductor is 375 W m^...

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