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  2. Value-added tax - Wikipedia

    en.wikipedia.org/wiki/Value-added_tax

    [98] [99] [100] However, two states enacted a form of VAT in lieu of a business income tax. Michigan used a form of VAT known as the "Single Business Tax" (SBT) from 1975 until voter-initiated legislation repealed it, replaced by the Michigan Business Tax in 2008. [101] Hawaii has a 4% General Excise Tax (GET) that is charged on gross business ...

  3. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    The figure shows a 10-score distribution, illustrates the percentile scores that result from these different algorithms, and serves as an introduction to the examples given subsequently. The simplest are nearest-rank methods that return a score from the distribution, although compared to interpolation methods, results can be a bit crude.

  4. Solar cell - Wikipedia

    en.wikipedia.org/wiki/Solar_cell

    As example, the energy transfer upconversion process (ETU), consists in successive transfer processes between excited ions in the near infrared. The upconverter material could be placed below the solar cell to absorb the infrared light that passes through the silicon. Useful ions are most commonly found in the trivalent state. Er +

  5. Plastic recycling - Wikipedia

    en.wikipedia.org/wiki/Plastic_recycling

    Globally, this is by far the most common form of recycling and in many countries it is the only type practised. It is the simplest and most economical technique. It has a lower carbon footprint than other processes. [86] However, several factors can reduce output quality, which limits its applicability. [86]

  6. Photosynthesis - Wikipedia

    en.wikipedia.org/wiki/Photosynthesis

    In its simplest form, this involves the membrane surrounding the cell itself. [22] However, the membrane may be tightly folded into cylindrical sheets called thylakoids , [ 23 ] or bunched up into round vesicles called intracytoplasmic membranes . [ 24 ]

  7. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    The simplest case of a normal distribution is known as the standard normal distribution or unit normal distribution. This is a special case when μ = 0 {\textstyle \mu =0} and σ 2 = 1 {\textstyle \sigma ^{2}=1} , and it is described by this probability density function (or density): φ ( z ) = e − z 2 2 2 π . {\displaystyle \varphi (z ...

  8. Central processing unit - Wikipedia

    en.wikipedia.org/wiki/Central_processing_unit

    For example, even though the IBM System/360 instruction set architecture was a 32-bit instruction set, the System/360 Model 30 and Model 40 had 8-bit data paths in the arithmetic logical unit, so that a 32-bit add required four cycles, one for each 8 bits of the operands, and, even though the Motorola 68000 series instruction set was a 32-bit ...

  9. Bose–Einstein condensate - Wikipedia

    en.wikipedia.org/wiki/Bose–Einstein_condensate

    Einstein proposed that cooling bosonic atoms to a very low temperature would cause them to fall (or "condense") into the lowest accessible quantum state, resulting in a new form of matter. Bosons include the photon , polaritons , magnons , some atoms and molecules (depending on the number of nucleons , see #Isotopes ) such as atomic hydrogen ...