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  2. Algebraic fraction - Wikipedia

    en.wikipedia.org/wiki/Algebraic_fraction

    A simple fraction contains no fraction either in its numerator or its denominator. A fraction is in lowest terms if the only factor common to the numerator and the denominator is 1. An expression which is not in fractional form is an integral expression. An integral expression can always be written in fractional form by giving it the denominator 1.

  3. Ammonium perchlorate composite propellant - Wikipedia

    en.wikipedia.org/wiki/Ammonium_perchlorate...

    Ammonium perchlorate composite propellant (APCP) is a solid rocket propellant.It differs from many traditional solid rocket propellants such as black powder or zinc-sulfur, not only in chemical composition and overall performance but also by being cast into shape, as opposed to powder pressing as with black powder.

  4. Abundance of the chemical elements - Wikipedia

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

    Another scale is mass fraction or, equivalently, percent by mass. [2] For example, the abundance of oxygen in pure water can be measured in two ways: the mass fraction is about 89%, because that is the fraction of water's mass which is oxygen. However, the mole fraction is about 33% because only 1 atom of 3 in water, H 2 O, is oxygen.

  5. Wet gas - Wikipedia

    en.wikipedia.org/wiki/Wet_gas

    LVF – Liquid volume fraction is the ratio of the liquid volumetric flow rate to the total volumetric flow rate. Hold up is the cross sectional area occupied by the liquid in the pipe carrying the wet gas flow. Void fraction is the ratio of the flow area occupied by the gas to the total flow area. Lockhart–Martinelli parameter. [5]

  6. Metallicity - Wikipedia

    en.wikipedia.org/wiki/Metallicity

    The hydrogen mass fraction is generally expressed as , where M is the total mass of the system, and is the mass of the hydrogen it contains. Similarly, the helium mass fraction is denoted as Y ≡ m H e M . {\displaystyle \ Y\equiv {\tfrac {m_{\mathsf {He}}}{M}}~.}

  7. Fusion power - Wikipedia

    en.wikipedia.org/wiki/Fusion_power

    3 1 T + 4 2 He 1 0 n + 7 3 Li → 3 1 T + 4 2 He + 1 0 n. The reactant neutron is supplied by the D-T fusion reaction shown above, and the one that has the greatest energy yield. The reaction with 6 Li is exothermic, providing a small energy gain for the reactor. The reaction with 7 Li is endothermic, but does not consume the neutron ...

  8. Renewable energy in Denmark - Wikipedia

    en.wikipedia.org/wiki/Renewable_energy_in_Denmark

    Only the carbon neutral biodegradable part of waste is classified as renewable energy generation which was defined as 55 percent of total waste from 2011 (in 2009 it was 58.8 percent). [37] Total waste provided 20 percent of district heating generation and between 4 and 5 percent of electricity generation in the country. [ 38 ]