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What is Energy?...

What is Energy?

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Energy is the capacity or stored ability of a body to do work.
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Knowledge Check

  • What is the energy of He^(+) electron in first order?

    A
    `40.8` eV
    B
    `-27.2` eV
    C
    `-54.4` eV
    D
    `-13.6` eV

  • What is the energy of a photon whose wavelength is 6840 Å ?

    A
    1.81 eV
    B
    3.6 eV
    C
    `-13.6 eV`
    D
    12.1 eV

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