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  2. Edge states - Wikipedia

    en.wikipedia.org/wiki/Edge_states

    In physics, Edge states are the topologically protected electronic states that exist at the boundary of the material and cannot be removed without breaking the system ...

  3. Hooke's law - Wikipedia

    en.wikipedia.org/wiki/Hooke's_law

    In physics, Hooke's law is an empirical law which states that the force (F) needed to extend or compress a spring by some distance (x) scales linearly with respect to that distance—that is, F s = kx, where k is a constant factor characteristic of the spring (i.e., its stiffness), and x is small compared to the total possible deformation of the spring.

  4. Tangential speed - Wikipedia

    en.wikipedia.org/wiki/Tangential_speed

    Travelling a greater distance in the same time means a greater speed, and so linear speed is greater on the outer edge of a rotating object than it is closer to the axis. This speed along a circular path is known as tangential speed because the direction of motion is tangent to the circumference of the circle.

  5. List of common physics notations - Wikipedia

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

    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) density: kilogram per cubic meter (kg/m 3) diameter: meter (m)

  6. Edge detection - Wikipedia

    en.wikipedia.org/wiki/Edge_detection

    A viewpoint dependent edge may change as the viewpoint changes, and typically reflects the geometry of the scene, such as objects occluding one another. A typical edge might for instance be the border between a block of red color and a block of yellow.

  7. Bekenstein bound - Wikipedia

    en.wikipedia.org/wiki/Bekenstein_bound

    The universal form of the bound was originally found by Jacob Bekenstein in 1981 as the inequality [1] [2] [3], where S is the entropy, k is the Boltzmann constant, R is the radius of a sphere that can enclose the given system, E is the total mass–energy including any rest masses, ħ is the reduced Planck constant, and c is the speed of light.

  8. List of physical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_physical_constants

    The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured.

  9. Edge-localized mode - Wikipedia

    en.wikipedia.org/wiki/Edge-localized_mode

    An edge-localized mode (ELM) is a plasma instability occurring in the edge region of a tokamak plasma due to periodic relaxations of the edge transport barrier in high-confinement mode. Each ELM burst is associated with expulsion of particles and energy from the confined plasma into the scrape-off layer.