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A sphere ,a cubeand a thin circular plat...

A sphere ,a cubeand a thin circular plate,all made of the same meteriel and having the same mass are initially heated to a temperature of 200°C .Which of them will cool fastest and which one slowest when left in air at room temperature?

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The circular plate has larger surface area, while the sphere has the least area . Hence the disc will cool fastest and the sphere will cool slowest.
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BINA LIBRARY-THERMAL PROPERTIES OF MATTER -EXERCISE
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  2. A metallic solid sphere and a hollow sphere of same material and exter...

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  3. A sphere ,a cubeand a thin circular plate,all made of the same meterie...

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  4. Heat is generated continuosly in an electric heater ,but its temperatu...

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  5. A zinc rod is measured by means of a brass scale (Which is correct at...

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  6. A hot ball of iron weighing 200 g is dropped into 500 g water at 10°C ...

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  7. The densities of two substance are 2:3 and their specific heats are 0....

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  8. Calculate the minimum amount of water at 15°C needed to cool 200g of ...

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  9. A piece of metal weighing 50 g is heated to a temperature of 1000°C a...

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  10. How much steam at 100°C will just melt 3200g of ice at -10°C ?

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  11. Find the result of mixing 100 g of ice at -12°C with 50g of water at 9...

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  12. Calculate the amount nof heat required to change 5.0 kg of a ice to -2...

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  13. Find the time in which a layer of ice 3 cm thick on the surface of a p...

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  14. The opposite face of a cubic block of iron of cross-section 8 sq.cm ar...

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  15. Calculate the rate of loss heat through a glass window of area 1000sq....

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  16. A body which has surface area of 5.0 cm^2 and a temperature of 727 ra...

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  17. The temperature of abody is increased from 27°C to 127°C. By what fra...

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  18. A body cools from 80°C to 50°C in 5 minutes.If the temperature of th...

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  19. Two vessels of different materials are similar in size in every respec...

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  20. The temperature of a black body increases from 7°C to 287°C .The rate...

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