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  2. Hindu–Arabic numeral system - Wikipedia

    en.wikipedia.org/wiki/Hindu–Arabic_numeral_system

    The Hindu–Arabic system is designed for positional notation in a decimal system. In a more developed form, positional notation also uses a decimal marker (at first a mark over the ones digit but now more commonly a decimal point or a decimal comma which separates the ones place from the tenths place), and also a symbol for "these digits recur ad infinitum".

  3. Nines (notation) - Wikipedia

    en.wikipedia.org/wiki/Nines_(notation)

    The purity of a gas is generally expressed as a grade prefixed with the letter N (rather than postfixed), indicating the "number of nines" in the percentage or decimal fraction. For example, a N2.0 gas is 99% (two nines) pure and 1% impurities by volume; a N6.0 gas is 99.9999% (six nines) pure, with 1 part per million (1 ppm or 1 vpm, volume ...

  4. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    1 in 1 744 278: Every 4776 years (once in recorded history) μ ± 5.5σ: 0.999 999 962 020 875: 3.798 × 10 −8 = 37.98 ppb: 1 in 26 330 254: Every 72 090 years (thrice in history of modern humankind) μ ± 6σ: 0.999 999 998 026 825: 1.973 × 10 −9 = 1.973 ppb: 1 in 506 797 346: Every 1.38 million years (twice in history of humankind) μ ± ...

  5. Hindustani language - Wikipedia

    en.wikipedia.org/wiki/Hindustani_language

    The standardised registers Hindi and Urdu are collectively known as HindiUrdu. [11] Hindustani is the lingua franca of the north and west of the Indian subcontinent, though it is understood fairly well in other regions also, especially in the urban areas. [12] This has led it to be characterised as a continuum that ranges between Hindi and ...

  6. Hinduism - Wikipedia

    en.wikipedia.org/wiki/Hinduism

    Hinduism (/ ˈ h ɪ n d u ˌ ɪ z əm /) [1] is an umbrella term [2] [3] [a] for a range of Indian religious and spiritual traditions (sampradayas) [4] [note 1] that are unified by adherence to the concept of dharma, a cosmic order maintained by its followers through rituals and righteous living, [5] [6] [7] [b] as first expounded in the Vedas.

  7. Indian people - Wikipedia

    en.wikipedia.org/wiki/Indian_people

    The oldest preserved examples of Indian music are the melodies of the Samaveda (1000 BC) that are still sung in certain Śrauta sacrifices; this is the earliest account of Indian musical hymns. [128] The Samaveda, and other Hindu texts, heavily influenced India's classical music tradition, which is known today in two distinct styles: Hindustani ...

  8. List of religious populations - Wikipedia

    en.wikipedia.org/wiki/List_of_religious_populations

    Guyana 1.3% Venezuela 1.1% Colombia 1.0% Belize 1.0% Honduras 0.9% Puerto Rico 0.7% Panama 0.5% Iceland 0.5% Guadeloupe 0.4% Argentina 0.2% Guatemala 0.2% (ARDA claim) [127] [better source needed] Spiritist estimates come from a single source, which gives a relative indication of the size of the Spiritist communities within each country.

  9. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    For example, for visible light, the refractive index of glass is typically around 1.5, meaning that light in glass travels at ⁠ c / 1.5 ⁠ ≈ 200 000 km/s (124 000 mi/s); the refractive index of air for visible light is about 1.0003, so the speed of light in air is about 90 km/s (56 mi/s) slower than c.