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Rapidity vs X - What's the difference?

rapidity | x |

As a noun rapidity

is speed, swiftness; the condition of being rapid.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

rapidity

English

Noun

(wikipedia rapidity) (rapidities)
  • speed, swiftness; the condition of being rapid
  • (physics) A measure of velocity relative to the speed of light
  • (physics) A measure of the velocity of a particle in a beam relative to the beam#s axis

    • Derived terms

    * midrapidity * pseudorapidity

    x

    Translingual

    {{Basic Latin character info, previous=W, next=Y, image= (wikipedia X)

    Etymology 1

    Letter

  • The twenty-fourth letter of the .
    • See also
    (Latn-script)

    Cardinal number

    (mul-number)
  • The number 10.

    • Symbol

    (mul-symbol)
  • A symbol of the IPA, representing a voiceless uvular fricative.
  • strike

    • Etymology 2

    Possibly from skull and crossbones

    Symbol

    (mul-symbol)
    • Derived terms
    * XXX

    See also

    {{Letter , page=X , NATO=X-ray , Morse=–··– , Character=X , Braille=? }} Image:Latin X.png, Capital and lowercase versions of X , in normal and italic type Image:Fraktur letter X.png, Uppercase and lowercase X in Fraktur Roman numerals ----