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  2. Fourth, fifth, and sixth derivatives of position - Wikipedia

    en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth...

    Snap, [6] or jounce, [2] is the fourth derivative of the position vector with respect to time, or the rate of change of the jerk with respect to time. [4] Equivalently, it is the second derivative of acceleration or the third derivative of velocity, and is defined by any of the following equivalent expressions: = ȷ = = =.

  3. March 4 - Wikipedia

    en.wikipedia.org/wiki/March_4

    March 4 is the 63rd day of the year ... recreating sees and naming bishops for the first time since 1603. [6] ... Ugandan long-distance runner (d. 2023)

  4. Action potential - Wikipedia

    en.wikipedia.org/wiki/Action_potential

    A neuron's ability to generate and propagate an action potential changes during development. How much the membrane potential of a neuron changes as the result of a current impulse is a function of the membrane input resistance. As a cell grows, more channels are added to the membrane, causing a decrease in input resistance. A mature neuron also ...

  5. Length constant - Wikipedia

    en.wikipedia.org/wiki/Length_constant

    Where voltage, V, is measured in millivolts, x is distance from the start of the potential (in millimeters), and λ is the length constant (in millimeters). V max is defined as the maximum voltage attained in the action potential, where: = where r m is the resistance across the membrane and I is the current flow.

  6. 2024 YR4 - Wikipedia

    en.wikipedia.org/wiki/2024_YR4

    2024 YR 4 is an asteroid that is classified as an Apollo-type (Earth-crossing) near-Earth object, with an estimated diameter of 40 to 90 metres (130 to 300 ft).As of 22 February 2025, it has a rating of 1 on the Torino scale, with a 1-in-280 (0.36%) chance of impacting Earth on 22 December 2032, [7] and a rating of −1.11 on the Palermo scale, corresponding to an impact hazard 7.8% of the ...

  7. When does the time change? Daylight saving time 'spring ... - AOL

    www.aol.com/does-time-change-daylight-saving...

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  8. Time–distance diagram - Wikipedia

    en.wikipedia.org/wiki/Timedistance_diagram

    A timedistance diagram is a chart with two axes: one for time, the other for location. The units on either axis depend on the type of project: time can be expressed in minutes (for overnight construction of railroad modification projects such as the installation of switches) or years (for large construction projects); the location can be (kilo)meters, or other distinct units (such as ...

  9. Portal:United States/On this day/March 4 - Wikipedia

    en.wikipedia.org/.../On_this_day/March_4

    January • February • March • April • May • June • July • August • September • October • November • December March 4 : Time: 09:16 UTC Date: January 26