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The correct relation between joule and e...

The correct relation between joule and erg is

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`1 J = 10^(7)` wegs
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MODERN PUBLICATION-WORK, ENERGY AND POWER -Revision Exercise (Very Short Answer Questions)
  1. Can work done by a non - conservative force be positive ?

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  2. Which physical quantity represents the area under the force displace...

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  3. The correct relation between joule and erg is

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  4. What is the work done by the sun on the earth when the earth revolve...

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  5. Can P.E. of an object be negative?

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  6. Is the mechanical energy always conserved ?

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  7. What will happen to the potential energy of an air bubble in water ...

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  8. A spring of spring constant k is cut in three equal pieces. The spring...

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  9. When is KE of a planet revolving around the sun maximum?

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  10. If K.E of a body is made three times , how will the momentum change...

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  11. If the momentum of a body is made three times , how will the kineti...

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  12. A bullet gets embedded in a wooden block. Where does its KE go?

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  13. One horse power is equal to

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  14. What is the power ? Write its dimensional formula .

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  15. How can you say that friction is a non - conservative force ?

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  16. The work done by the centripetal force in quarter revolution would be,

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  17. Can we change K.E of a system without changing its momentum ?

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  18. What will happen to potential energy of a spring when it is compresse...

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  19. What wil happen to potential energy of a spring when it is streched ...

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  20. What changes in uniform circular motion , momentm or K.E ?

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