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  2. Ray J - Wikipedia

    en.wikipedia.org/wiki/Ray_J

    [3] Ray J's 1997 debut single, " Let It Go ", was released by EastWest Records for the soundtrack to the F. Gary Gray film, Set It Off . Both moderate hits, the song peaked within the top 40 of the Billboard Hot 100 and additionally served as the lead single for Ray J's debut studio album, Everything You Want (1997), which entered the Top R&B ...

  3. Equal-loudness contour - Wikipedia

    en.wikipedia.org/wiki/Equal-loudness_contour

    An equal-loudness contour is a measure of sound pressure level, over the frequency spectrum, for which a listener perceives a constant loudness when presented with pure steady tones. [1] The unit of measurement for loudness levels is the phon and is arrived at by reference to equal-loudness contours. By definition, two sine waves of differing ...

  4. List of musical scales and modes - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_scales_and...

    Chord-scale system. Heptatonic scale. Jazz scale. List of chord progressions. List of chords. List of musical intervals. List of pitch intervals. Arabian maqam. Modes of limited transposition.

  5. Take 20% Off Raycon Earbuds, Headphones and Speakers ... - AOL

    www.aol.com/entertainment/20-off-raycon-earbuds...

    These Basic Earbuds. The Work Earbuds Classic. Raycon. For everyday wear that’s easy to take in and out, these buds are the perfect pick! See it! Get The Work Earbuds Classic (originally $120 ...

  6. History of PDF - Wikipedia

    en.wikipedia.org/wiki/History_of_PDF

    History of PDF. The Portable Document Format (PDF) was created by Adobe Systems, introduced at the Windows and OS/2 Conference in January 1993 and remained a proprietary format until it was released as an open standard in 2008. Since then, it has been under the control of an International Organization for Standardization (ISO) committee of ...

  7. 1 − 2 + 3 − 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%E2%88%92_2_%2B_3_%E2%88...

    The idea becomes clearer by considering the general series 1 − 2x + 3x 2 − 4x 3 + 5x 4 − 6x 5 + &c. that arises while expanding the expression 1 ⁄ (1+x) 2, which this series is indeed equal to after we set x = 1.

  8. Adobe Acrobat version history - Wikipedia

    en.wikipedia.org/wiki/Adobe_Acrobat_version_history

    Adobe Acrobat 9.0 was released. Support for version 9 ended June 26, 2013, [10] with the last available update being 9.5.5. Adobe Acrobat 9.5.5 is the very last version, which can be installed on Unix-based system. Therefore 10 years after release Adobe Acrobat 9.5.5 is still used on modern and cutting-edge Systems.

  9. 1 + 2 + 3 + 4 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E...

    The partial sums of the series 1 + 2 + 3 + 4 + 5 + 6 + ⋯ are 1, 3, 6, 10, 15, etc.The nth partial sum is given by a simple formula: = = (+). This equation was known ...