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  2. Speed - Wikipedia

    en.wikipedia.org/wiki/Speed

    In equation form, that is =, where is ... speed divided by the speed of light in vacuum (symbol c = 299 792 458 m/s). Conversions between common units of speed; m/s ...

  3. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    Historically, the symbol V was used as an alternative symbol for the speed of light, introduced by James Clerk Maxwell in 1865. In 1894, Paul Drude redefined c with its modern meaning. Einstein used V in his original German-language papers on special relativity in 1905, but in 1907 he switched to c , which by then had become the standard symbol ...

  4. List of common physics notations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_physics...

    speed of light (in vacuum) 299,792,458 meters per second (m/s) speed of sound: meter per second (m/s) specific heat capacity: joule per kilogram per kelvin (J⋅kg −1 ⋅K −1) viscous damping coefficient kilogram per second (kg/s) electric displacement field also called the electric flux density coulomb per square meter (C/m 2)

  5. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    The speed of sound in a plasma for the common case that the electrons are hotter than the ions (but not too much hotter) is given by the formula (see here) = / = / /, where m i is the ion mass; μ is the ratio of ion mass to proton mass μ = m i / m p ;

  6. Velocity - Wikipedia

    en.wikipedia.org/wiki/Velocity

    The general formula for the escape velocity of an object at a distance r from the center of a planet with mass M is [12] = =, where G is the gravitational constant and g is the gravitational acceleration. The escape velocity from Earth's surface is about 11 200 m/s, and is irrespective of the direction of the object.

  7. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    a symbol for psychology; represents: the wave function in the Schrödinger equation of quantum mechanics; the J/psi mesons in particle physics; the stream function in fluid dynamics; the reciprocal Fibonacci constant; the second Chebyshev function in number theory; the polygamma function in mathematics; the supergolden ratio [8]

  8. Knot (unit) - Wikipedia

    en.wikipedia.org/wiki/Knot_(unit)

    The knot (/ n ɒ t /) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.151 mph or 0.514 m/s). [1] [2] The ISO standard symbol for the knot is kn. [3]

  9. Tangential speed - Wikipedia

    en.wikipedia.org/wiki/Tangential_speed

    Tangential speed is the speed of an object undergoing circular motion, i.e., moving along a circular path. [1] A point on the outside edge of a merry-go-round or turntable travels a greater distance in one complete rotation than a point nearer the center.