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  2. 24/20 order - Wikipedia

    en.wikipedia.org/wiki/24/20_order

    The 24/20 order or 24/20 declaration was a Mozambican operation forcing the Portuguese to leave the country after the independence of Mozambique on 25 June 1975, or give up their passports and become exclusively Mozambican. Armando Guebuza, its creator, made this rule such that the Portuguese had only 24 hours to leave and could carry only 20 ...

  3. Orders of magnitude (numbers) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(numbers)

    Mathematics: The probability of matching 20 numbers for 20 in a game of keno is approximately 2.83 × 10 −19. Mathematics: The odds of a perfect bracket in the NCAA Division I men's basketball tournament are 1 in 2 63, approximately 1.08 × 10 −19, if coin flips are used to predict the winners of the 63 matches. 10 −18 Snake eyes

  4. Decibel - Wikipedia

    en.wikipedia.org/wiki/Decibel

    Decibel. The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel ( B ). It expresses the ratio of two values of a power or root-power quantity on a logarithmic scale. Two signals whose levels differ by one decibel have a power ratio of 10 1/10 (approximately 1.26) or root-power ratio of 10 1/20 (approximately 1.12 ).

  5. Roll-off - Wikipedia

    en.wikipedia.org/wiki/Roll-off

    First-order roll-off First-order RC filter low-pass filter circuit. Roll-off of a first-order low-pass filter at 6 dB/octave (20 dB/decade) A simple first-order network such as a RC circuit will have a roll-off of 20 dB/decade. This is approximately equal (to within normal engineering required accuracy) to 6 dB/octave and is the more usual ...

  6. Ten Commandments - Wikipedia

    en.wikipedia.org/wiki/Ten_Commandments

    The text of the Ten Commandments appears in three different versions in the Bible: [1] at Exodus 20:2–17, Deuteronomy 5:6–21, and the "Ritual Decalogue" of Exodus 34:11–26 . According to the Book of Exodus in the Torah, the Ten Commandments were revealed to Moses at Mount Sinai, told by Moses to the Israelites in Exodus 19:25 and ...

  7. Butterworth filter - Wikipedia

    en.wikipedia.org/wiki/Butterworth_filter

    When viewed on a logarithmic Bode plot, the response slopes off linearly towards negative infinity. A first-order filter's response rolls off at −6 dB per octave (−20 dB per decade) (all first-order lowpass filters have the same normalized frequency response). A second-order filter decreases at −12 dB per octave, a third-order at −18 dB ...