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A lead bullet just melts when stopped by...

A lead bullet just melts when stopped by an obstacle. Assuming that 25 per cent of the heat is absorbed by the obstacle, find the velocity of the bullet if its initial temperature is `27^@C` . (Melting point of lead `= 327^@C`, specific heat of lead `=0.03 cal//g.^@C`, latent heat of fusion of lead `=6 cal//g, J = 4.2 J//cal`).

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409.87 m/s
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A lead bullet just melts when stopped by an obstacle. Assuming that 25 per cent of the heat is absorbed by the obstacle, find the velocity of the bullet if its initial temperature is 27^@C . (Melting point of lead= 327^@C , specific heat of lead = 0.03 calories //gm//^@C , latent jeat of fusion of lead= 6calories//gm,J=4.2 joules //calorie ).

A bullet of lead melts when stopped by obstacle. Assuming that 25 per cent of the heat is absorbed by the osbtacle, find the velocity of the bullet if its initial temperature is 27^(@)C . (Melting point of lead 327^(@)C , specific heat capacity of lead =30 cal kg^(-1)K^(-1) specific latent heat of fusion of lead =6000 cal kg^(-1) and J=4.2 joules cal^(-1) )

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A lead bullet penetrates into a solid object and melts Assuming that 50% of its K.E. was used to heat it , calculate the initial speed of the bullet , The initial temp , of bullet is 27^(@)c and its melting point is 327^(@)C Latent heat of fasion of lead = 2.5 xx 10^(4) J kg^(-1) and sp heat capacity of lead = 1.25 J kg^(-1) K^(-1)

What amount of ice will remains when 52 g ice is added to 100 g of water at 40^(@)C ? Specific heat of water is 1 cal/g and latent heat of fusion of ice is 80 cal/g.

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PHYSICS GALAXY - ASHISH ARORA-HEAT AND THERMAL EXPANSION-PRACTICE EXERCISE
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  2. The coefficient of apparent expansion of a liquid when determined usin...

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  3. A solid whose volume does not change with temperature floats in a liqu...

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  4. A small quantity of a liquid which dows not mix with water sinks to th...

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  5. A can of water of volume 0.5 m^(3) at a temperature 30^(@)C is cooled ...

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  6. Equal masses of three liquids A, B and C have temperature 10^(@)C, 25^...

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  7. A water heater can generate 8500 kcal/hr. How much water can it heat f...

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  8. When a 290 gm piece of iron at 180^(@)C is placed in a 100 gm aluminiu...

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  9. The specific heat of solids at low temperatures varies with absolute t...

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  10. A certain calorimeter has a water equivalent of 4.9 gm. That is in hea...

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  11. 5g ice at 0^(@)C is mixed with 5g of steam at 100^(@)C. What is the fi...

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  12. A block of ice of mass M= 50 kg slides on a horizontal surface. It sta...

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  13. The temperature of a body rises by 44^(@)C when a certain amount of he...

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  14. In a mixture of 35 g of ice and 35 g of water in equilibrium, 4 gm ste...

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  15. A lead bullet just melts when stopped by an obstacle. Assuming that 25...

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  16. Aluminium container of mass of 10 g contains 200 g of ice at-20^(@)C. ...

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  17. 1 kg of ice at 0^(@)C is mixed with 1 kg of steam at 100^(@)C. Find th...

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  18. When a block of metal of specific heat 0.1 cal//g//^@C and weighing 11...

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  19. A pitcher contains 10 kg of water at 20^(@)C. Water comes to its outer...

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  20. A pitcher contains 1 kg water at 40^(@)C. It is given that the rate of...

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