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What will be the difference in temperatu...

What will be the difference in temperature between the top and the bottom of a 400 m high waterfall if 80% of heat produced is retained by water?

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The correct Answer is:
`0747^(@)C`
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CHHAYA PUBLICATION-FIRST AND SECOND LAW OF THERMODYNAMICS-Exercise - Problem Set - II (Marks 3 or 4)
  1. The temperature of a hailstone is 0^(@)C and initially it is at rest. ...

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  2. Find out the minimum height from which a piece of ice should be droppe...

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  3. What will be the difference in temperature between the top and the bot...

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  4. A lead bullet hits a target at a velocity of 300 m cdot s^(-1). If it ...

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  5. Earth gains energy from the sun at a rate of 8.4 J cdot cm^(-2) cdot "...

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  6. The mean velocity of raindrops is 20 m cdot s^(-1) . When these drops ...

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  7. A hole is made in a piece of iron of mass 200 g with the help of a 186...

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  8. The speed of a 50 kg heavenly object reduces from 30 km cdot "min"^(-1...

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  9. Sea water is splattered horizontally from a jet at a speed of 10 m cdo...

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  10. Find out the minimum height from which a piece of ice at 0^(@)C should...

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  11. A lead bullet melts on hitting a fixed target. What will be the minimu...

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  12. A certain volume of a gas expands at one standard atmosphere pressure ...

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  13. The volume of 1 mol of a gas is doubled when it expands isothermally a...

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  14. 70 cal of heat is required to increase the temperature of 2 mol of an ...

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  15. What will be the change in internal energy of 128 g of oxygen gas at c...

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  16. What will be the increase in temperature if dry air at 27^(@)C is comp...

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  17. The tyre of a motorcar bursts suddenly when air was being pumped in it...

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  18. Calculate the amount of work done, if 20 g of hydrogen gas is compress...

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  19. Some amount of gas at 27^(@)C is suddenly compressed to 27 times its ...

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  20. In an adiabatic process where pressure is increased by 2/3%, if (Cp)/(...

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