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A block of ice with mass m falls into a ...

A block of ice with mass m falls into a lake. After impact, a mass of ice `(m)/(5)` melts. Both the block of ice and the lake have a temperature of `0^(@)C`. If L represents the latent heat of fusion, the distance the ice falls before striking the surface is

A

`(L)/(5g)`

B

`(5L)/(g)`

C

`(gL)/(5m)`

D

`(mL)/(5g)`

Text Solution

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The correct Answer is:
A
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MOTION-HEAT - 1-EXERCISE -2 (Level - I) Objective Problems | JEE Main
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  2. The density of a material A is 1500kg//m^(3) and that of another mater...

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  3. The amount of heat supplied to decrease the volume of an ice water mix...

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  4. Steam at 100^(@)C is passed into 1.1 kg of water contained in a calori...

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  5. If specific heat of a substance is infinite, it means

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  6. A lake surface is exposed to an atmosphere where the temperature is lt...

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  7. One end of a 2.35m long and 2.0cm radius aluminium rod (K=235W.m^(-1)K...

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  8. Two sheets of thickness d and 2d and same area are touching each other...

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  9. A bucket full of hot water cools from 75^(@)C to 70^(@)C in time T(1),...

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

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  11. Two thermometers A and B are exposed in sunlight. The bulb of A is pai...

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  12. Which of the following law states that "good absorbers of heat are goo...

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  13. A hot body will radiate maximum energy if its surface is

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  14. There is a black spot on a body. If the body is heated and carried in ...

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  15. We consider the radiation emitted by the human body. Which of the foll...

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  16. Half part of ice block is covered with black cloth and rest half is co...

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  17. If 'p' calorie of heat energy is incident on a body and absorbs 'q' ca...

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  18. If same amount of ice in placed in black and white cloth then ice in b...

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  19. A black body emits radiations of maximum intensity at a wavelength of ...

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  20. The radiant energy from the Sun incident normally at the surface of ea...

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