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  2. Phase transition - Wikipedia

    en.wikipedia.org/wiki/Phase_transition

    In physics, chemistry, and other related fields like biology, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter : solid , liquid , and gas , and in rare cases, plasma .

  3. Numerically controlled oscillator - Wikipedia

    en.wikipedia.org/wiki/Numerically_controlled...

    A binary phase accumulator consists of an N-bit binary adder and a register configured as shown in Figure 1. [5] Each clock cycle produces a new N-bit output consisting of the previous output obtained from the register summed with the frequency control word (FCW) which is constant for a given output frequency.

  4. Energy density - Wikipedia

    en.wikipedia.org/wiki/Energy_density

    Silicon (phase change) 1.790 4.5 500 1,285 Energy stored through solid to liquid phase change of silicon [88] Strontium bromide hydrate: 0.814 [89] 1.93 628 Thermal energy of phase change at 88.6 °C (361.8 K) Liquid nitrogen: 0.77 [90] 0.62 213.9 172.2 Maximum reversible work at 77.4 K with 300 K reservoir Compressed air at 30 MPa (4,400 psi ...

  5. Signal-to-noise ratio - Wikipedia

    en.wikipedia.org/wiki/Signal-to-noise_ratio

    In physics, the average power of an AC signal is defined as the average value of voltage times current; for resistive (non-reactive) circuits, where voltage and current are in phase, this is equivalent to the product of the rms voltage and current: =

  6. Adiabatic process - Wikipedia

    en.wikipedia.org/wiki/Adiabatic_process

    Accordingly, Rankine measured quantity of heat in units of work, rather than as a calorimetric quantity. [18] In 1854, Rankine used a quantity that he called "the thermodynamic function" that later was called entropy, and at that time he wrote also of the "curve of no transmission of heat", [19] which he later called an adiabatic curve. [13]

  7. Cavitation - Wikipedia

    en.wikipedia.org/wiki/Cavitation

    There are different flow patterns detected as a cavitation flow progresses: inception, developed flow, supercavitation, and choked flow. Inception is the first moment that the second phase (gas phase) appears in the system. This is the weakest cavitating flow captured in a system corresponding to the highest cavitation number. When the cavities ...

  8. Boltzmann constant - Wikipedia

    en.wikipedia.org/wiki/Boltzmann_constant

    Boltzmann constant: The Boltzmann constant, k, is one of seven fixed constants defining the International System of Units, the SI, with k = 1.380 649 x 10-23 J K-1.The Boltzmann constant is a proportionality constant between the quantities temperature (with unit kelvin) and energy (with unit joule).

  9. Fusion power - Wikipedia

    en.wikipedia.org/wiki/Fusion_power

    The metal collects charged particles, drawing a current. As the voltage changes, the current changes. This makes an IV Curve. The IV-curve can be used to determine the local plasma density, potential and temperature. [66] Thomson scattering: "Light scatters" from plasma can be used to reconstruct plasma behavior, including density and temperature.