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  2. Absorption (electromagnetic radiation) - Wikipedia

    en.wikipedia.org/wiki/Absorption_(electromagnetic...

    In physics, the D-region of Earth's ionosphere is known to significantly absorb radio signals that fall within the high-frequency electromagnetic spectrum. In nuclear physics, absorption of nuclear radiations can be used for measuring the fluid levels, densitometry or thickness measurements. [2]

  3. Energy absorber - Wikipedia

    en.wikipedia.org/wiki/Energy_absorber

    A kinetic-energy absorbing medium, sometimes called a crash pit or runaway truck ramp; A shock absorber, a device to dampen spring rebound by expending work by forcing a fluid through ports, and so converting the mechanical energy to heat; In the context of Fall arrest, an energy absorber is a device that limits the energy of a falling body

  4. MinutePhysics - Wikipedia

    en.wikipedia.org/wiki/MinutePhysics

    MinutePhysics is an educational YouTube channel created by Henry Reich in 2011. The channel's videos use whiteboard animation to explain physics-related topics. Early videos on the channel were approximately one minute long. [2] As of March 2024, the channel has over 5.7 million subscribers.

  5. Dynamo theory - Wikipedia

    en.wikipedia.org/wiki/Dynamo_theory

    Kinetic energy provided by planetary rotation; An internal energy source to drive convective motions within the fluid. [11] In the case of the Earth, the magnetic field is induced and constantly maintained by the convection of liquid iron in the outer core. A requirement for the induction of field is a rotating fluid.

  6. Photoelectrochemical process - Wikipedia

    en.wikipedia.org/wiki/Photoelectrochemical_process

    The excess energy gives the released electron higher kinetic energy than the usual case of just-above threshold ionization. More precisely, the system will have multiple peaks in its photoelectron spectrum which are separated by the photon energies, this indicates that the emitted electron has more kinetic energy than in the normal (lowest ...

  7. Energy cascade - Wikipedia

    en.wikipedia.org/wiki/Energy_cascade

    Schematic illustration of production, energy cascade and dissipation in the energy spectrum of turbulence. The largest motions, or eddies, of turbulence contain most of the kinetic energy, whereas the smallest eddies are responsible for the viscous dissipation of turbulence kinetic energy. Kolmogorov hypothesized that when these scales are well ...

  8. Eddy current - Wikipedia

    en.wikipedia.org/wiki/Eddy_current

    The kinetic energy used to overcome this drag is dissipated as heat by the currents flowing through the metal, so the metal gets warm under the magnet. As described by Ampère's circuital law , each of the circular currents in the sheet induces its own magnetic field (marked in blue arrows in the diagram).

  9. Energy harvesting - Wikipedia

    en.wikipedia.org/wiki/Energy_harvesting

    Energy harvesting (EH) – also known as power harvesting, energy scavenging, or ambient power – is the process by which energy is derived from external sources (e.g., solar power, thermal energy, wind energy, salinity gradients, and kinetic energy, also known as ambient energy), then stored for use by small, wireless autonomous devices, like those used in wearable electronics, condition ...

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