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Why can a ship not use the internal ener...

Why can a ship not use the internal energy of sea water to operate its engine?

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For the operation of heat engine, we require a sink of heat at lower temperature having high internal capacity. This is not availiable in the sea.
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PRADEEP-THERMODYNAMICS-Conceptual Problems
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  3. Can we increase the temperature of a gas without supplying heat to it?

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  5. Is the internal energy of a gas a function of the pressure? Explain.

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  7. First law of thermodynamics does not forbid flow of heat from lower te...

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  8. If on giving 40 joul e of heat to a system, work done on the system i...

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  10. A system goes from A and B via two processes. I and II as shown in fig...

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  13. Can the Carnot engine be realised in practice?

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  14. No real engine can have an efficiency greater than that of a carnot en...

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  15. A heat engine coverts disordered mechanical motion into ordered mechan...

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  16. What is meant by reversible process? Explain why the efficiency of a r...

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  17. Why can a ship not use the internal energy of sea water to operate its...

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  18. What is the significance of area of closed curve on P-V diagrams?

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  19. Can the work done during a cyclic process be zero?

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  20. Heat equivalent to 30J is supplied to a thermodynamic system and 10 J ...

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