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  2. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1. [1] [2] [3]

  3. Eutectic system - Wikipedia

    en.wikipedia.org/wiki/Eutectic_system

    Sodium chloride and water form a eutectic mixture whose eutectic point is −21.2 °C [8] and 23.3% salt by mass. [9] The eutectic nature of salt and water is exploited when salt is spread on roads to aid snow removal , or mixed with ice to produce low temperatures (for example, in traditional ice cream making).

  4. Atomic ratio - Wikipedia

    en.wikipedia.org/wiki/Atomic_ratio

    In laser physics however, the atomic ratio may refer to the doping ratio or the doping fraction. For example, theoretically, a 100% doping ratio of Yb : Y 3 Al 5 O 12 is pure Yb 3 Al 5 O 12 . The doping fraction equals,

  5. Abundance of the chemical elements - Wikipedia

    en.wikipedia.org/wiki/Abundance_of_the_chemical...

    The abundance of the chemical elements is a measure of the occurrences of the chemical elements relative to all other elements in a given environment. Abundance is measured in one of three ways: by mass fraction (in commercial contexts often called weight fraction), by mole fraction (fraction of atoms by numerical count, or sometimes fraction of molecules in gases), or by volume fraction.

  6. Brix - Wikipedia

    en.wikipedia.org/wiki/Brix

    A sucrose solution with an apparent specific gravity (20°/20 °C) of 1.040 would be 9.99325 °Bx or 9.99359 °P while the representative sugar body, the International Commission for Uniform Methods of Sugar Analysis (ICUMSA), which favours the use of mass fraction, would report the solution strength as 9.99249%. Because the differences between ...

  7. Fraction of inspired oxygen - Wikipedia

    en.wikipedia.org/wiki/Fraction_of_Inspired_Oxygen

    Fraction of inspired oxygen (F I O 2), correctly denoted with a capital I, [1] is the molar or volumetric fraction of oxygen in the inhaled gas. Medical patients experiencing difficulty breathing are provided with oxygen-enriched air, which means a higher-than-atmospheric F I O 2 .

  8. Solar-cell efficiency - Wikipedia

    en.wikipedia.org/wiki/Solar-cell_efficiency

    Another defining term in the overall behaviour of a solar cell is the fill factor (FF). This factor is a measure of quality of a solar cell. This factor is a measure of quality of a solar cell. This is the available power at the maximum power point ( P m ) divided by the open circuit voltage ( V OC ) and the short circuit current ( I SC ):

  9. Quantum computing - Wikipedia

    en.wikipedia.org/wiki/Quantum_computing

    Careful estimates [101] [102] show that at least 3 million physical qubits would factor 2,048-bit integer in 5 months on a fully error-corrected trapped-ion quantum computer. In terms of the number of physical qubits, to date, this remains the lowest estimate [103] for practically useful integer factorization problem sizing 1,024-bit or larger.