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planck's constant

n.
1.the constant of proportionality relating the energy of a photon to its frequency

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    Idiom of the Day

    come on the scene
    to appear in a certain area or place
    When the new DVD player came on the scene everybody wanted one.



    1.
    He must have a lot of money because this summer he is going on a cruise ________ the world.

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    Invention
    Invention : cash register
    Year : 1879
    Inventor : james ritty
    Country : us.      .. More >>
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