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  2. Period 2 element - Wikipedia

    en.wikipedia.org/wiki/Period_2_element

    A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements.The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behavior of the elements as their atomic number increases; a new row is started when chemical behavior begins to repeat, creating columns of elements with similar properties.

  3. Angular frequency - Wikipedia

    en.wikipedia.org/wiki/Angular_frequency

    A sphere rotating around an axis. Points farther from the axis move faster, satisfying ω = v / r.. In physics, angular frequency (symbol ω), also called angular speed and angular rate, is a scalar measure of the angle rate (the angle per unit time) or the temporal rate of change of the phase argument of a sinusoidal waveform or sine function (for example, in oscillations and waves).

  4. PSR J0737−3039 - Wikipedia

    en.wikipedia.org/wiki/PSR_J0737%E2%88%923039

    The orbital period of J0737−3039 (2.4 hours) is one of the shortest known for such an object (one-third that of the Taylor–Hulse binary), which enables the most precise tests yet. In 2005, it was announced that measurements had shown an excellent agreement between general relativity theory and observation.

  5. Circular motion - Wikipedia

    en.wikipedia.org/wiki/Circular_motion

    In physics, uniform circular motion describes the motion of a body traversing a circular path at a constant speed. ... The period of the motion is 2 ...

  6. List of common physics notations - Wikipedia

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

    square meter (m 2) amplitude: meter: atomic mass number: unitless acceleration: meter per second squared (m/s 2) magnetic flux density also called the magnetic field density or magnetic induction tesla (T), or equivalently, weber per square meter (Wb/m 2) capacitance: farad (F) heat capacity

  7. Chaos theory - Wikipedia

    en.wikipedia.org/wiki/Chaos_theory

    For example, → + → (or approximately 0.3454915 → 0.9045085 → 0.3454915) is an (unstable) orbit of period 2, and similar orbits exist for periods 4, 8, 16, etc. (indeed, for all the periods specified by Sharkovskii's theorem).

  8. Rotational frequency - Wikipedia

    en.wikipedia.org/wiki/Rotational_frequency

    Physics portal Category; Rotational ... (2 π radians): ν=ω ... Similar to ordinary period, the reciprocal of rotational frequency is the rotation period or period ...

  9. Periodic trends - Wikipedia

    en.wikipedia.org/wiki/Periodic_trends

    In general, the atomic radius decreases as we move from left-to-right in a period, and it increases when we go down a group. This is because in periods, the valence electrons are in the same outermost shell. The atomic number increases within the same period while moving from left to right, which in turn increases the effective nuclear charge.