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A solid cube and a solid sphere of the s...

A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature `120^(@)C`, then

A

Both of themwill cool down at the same rate

B

the cube will cool down faster than the sphere

C

the sphere will cool down faster than the cube

D

whichever of the two is heavier will cool down faster

Text Solution

Verified by Experts

The correct Answer is:
A
When both have same are and same temperature, they will cool at the same rate.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-KINETIC THEORY OF GASES ANDRADIATION-Exercise 1
  1. Consider a black body radiation in a cubical box at absolute temperatu...

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  2. When a gas filled in a closed vessel is heated through 1^(@)C, its pre...

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  3. An inflated rubber balloon contains one mole of an ideal gas has a pre...

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  4. The total radiant energy per unit area, normal to the direction of inc...

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  5. At 273^(@)C ,the emissive power of a perfect black body is R . What ...

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  6. A black body at 227^(@)C radiates heat at the rate of 7 cal cm^(-2) s...

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  7. The rate of emission of a black body at 0^(@)C is its rate of emissio...

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  8. Two spherical black bodies of radii R(1) and R(2) and with surface tem...

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  9. A solid cube and a solid sphere of the same material have equal surfac...

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  10. Two gases A and B having the same temperature T, same pressure P and s...

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  11. The rectangular surface of area 8 cm xx 4 cm of a black body at temper...

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  12. The air density at mount Everest is less than that at the sea level . ...

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  13. The temperature of a black body is increased by 50% , then the percent...

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  14. The frequency (v(m)) corresponding to which energy emitted by a black...

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  15. A kettle with 2 litre water at 27^@C is heated by operating coil heate...

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  16. An object is cooled from 75^(@)C to 65^(@)C in 2 min in a room at 30^(...

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  17. A planet is at an average distance d from the sun and its average surf...

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  18. The power of black body at temperature 200 K is 544 W .Its surface are...

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  19. The wavelength of maximum intensity of radiation emitted by a star is ...

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  20. A body cools from 80^(@)C to 50^(@)C in 5 min-utes Calculate the time ...

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