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  2. Triplex locomotive - Wikipedia

    en.wikipedia.org/wiki/Triplex_locomotive

    The Erie Matt H. Shay 2-8-8-8-2. The only 2-8-8-8-4 triplex locomotive ever built. A triplex locomotive was a steam locomotive that divided the driving force on its wheels by using three pairs of cylinders to drive three sets of driving wheels. Any such locomotive will inevitably be articulated. All triplex locomotives built were of the Mallet ...

  3. Septuple meter - Wikipedia

    en.wikipedia.org/wiki/Septuple_meter

    21. 8 as 7. 4 with 3 subdivisions. Septuple meter (British: metre) or (chiefly British) septuple time is a meter with each bar (American: measure) divided into 7 notes of equal duration, usually 7. 4 or 7. 8 (or in compound meter, 21. 8 time).

  4. Power of two - Wikipedia

    en.wikipedia.org/wiki/Power_of_two

    Power of two. A power of two is a number of the form 2n where n is an integer, that is, the result of exponentiation with number two as the base and integer n as the exponent . Powers of two with non-negative exponents are integers: 20 = 1, 21 = 2, and 2n is two multiplied by itself n times. [1] [2] The first ten powers of 2 for non-negative ...

  5. 4-8-4 - Wikipedia

    en.wikipedia.org/wiki/4-8-4

    The 4-8-4 wheel arrangement was a progression from the 4-8-2 Mountain type and, like the 2-8-4 Berkshire and 4-6-4 Hudson types, an example of the "Super Power" concept in steam locomotive design that made use of the larger firebox that could be supported by a four-wheel trailing truck, which allowed greater production of steam. The four-wheel ...

  6. Bortle scale - Wikipedia

    en.wikipedia.org/wiki/Bortle_scale

    8 City sky 4.1–4.5 <18.00 the sky is light gray or orange – one can easily read; stars forming familiar constellation patterns may be weak or invisible; M31 and M44 are barely glimpsed by an experienced observer on good nights; even with a telescope, only bright Messier objects can be detected; limiting magnitude with 12.5" reflector is 13; 9

  7. 4-8-8-2 - Wikipedia

    en.wikipedia.org/wiki/4-8-8-2

    Under the Whyte notation for the classification of steam locomotives, a 4-8-8-2 is a locomotive with four leading wheels, two sets of eight driving wheels, and a two-wheel trailing truck. Other equivalent classifications are: UIC classification: 2DD1 (also known as German classification and Italian classification) French classification: 240+041.

  8. People Swear By the '4-7-8' Breathing Technique To Fall ... - AOL

    www.aol.com/people-swear-4-7-8-150013473.html

    More recently, people swear by the "4-7-8" breathing technique to fall asleep faster, so we chatted with an expert who breaks dow People Swear By the '4-7-8' Breathing Technique To Fall Asleep ...

  9. Forty Six & 2 - Wikipedia

    en.wikipedia.org/wiki/Forty_Six_&_2

    Forty Six & 2" is a song by American rock band Tool. It was released as the fourth single from their second studio album Ænima in 1996 and received radio airplay. [ 1 ] In March 2023, Rolling Stone ranked "Forty Six &2" at number 53 on their "100 Greatest Heavy Metal Songs of All Time" list.