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  2. Wavenumber - Wikipedia

    en.wikipedia.org/wiki/Wavenumber

    Wave numbers and wave vectors play an essential role in optics and the physics of wave scattering, such as X-ray diffraction, neutron diffraction, electron diffraction, and elementary particle physics. For quantum mechanical waves, the wavenumber multiplied by the reduced Planck constant is the canonical momentum.

  3. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    A worksheet, in the word's original meaning, is a sheet of paper on which one performs work. They come in many forms, most commonly associated with children's school work assignments, tax forms, and accounting or other business environments. Software is increasingly taking over the paper-based worksheet.

  4. Rubens tube - Wikipedia

    en.wikipedia.org/wiki/Rubens_tube

    A Rubens tube, also known as a standing wave flame tube, or simply flame tube, is a physics apparatus for demonstrating acoustic standing waves in a tube. Invented by German physicist Heinrich Rubens in 1905, it graphically shows the relationship between sound waves and sound pressure , as a primitive oscilloscope .

  5. Living Books - Wikipedia

    en.wikipedia.org/wiki/Living_Books

    Living Books is a series of interactive read-along adventures aimed at children aged 3–9. Created by Mark Schlichting, the series was mostly developed by Living Books for CD-ROM and published by Broderbund for Mac OS and Microsoft Windows.

  6. Wave - Wikipedia

    en.wikipedia.org/wiki/Wave

    A standing wave, also known as a stationary wave, is a wave whose envelope remains in a constant position. This phenomenon arises as a result of interference between two waves traveling in opposite directions. The sum of two counter-propagating waves (of equal amplitude and frequency) creates a standing wave. Standing waves commonly arise when ...

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  8. Wave packet - Wikipedia

    en.wikipedia.org/wiki/Wave_packet

    The narrow-width limit of the Gaussian wave packet solution discussed is the free propagator kernel K. For other differential equations, this is usually called the Green's function, [22] but in quantum mechanics it is traditional to reserve the name Green's function for the time Fourier transform of K.

  9. Arctic blast to blanket much of US with below-freezing ...

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    Millions of Americans should prepare for an Arctic blast that will blanket much of the country in below-freezing temperatures over the next several days. Frigid conditions are expected over a ...

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