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The Gaussian gravitational constant used in space dynamics is a defined constant and the Cavendish experiment can be considered as a measurement of this constant. In Cavendish's time, physicists used the same units for mass and weight, in effect taking g as a standard acceleration.
Based on this, Hutton's 1778 result is equivalent to G ≈ 8 × 10 −11 m 3 ⋅kg −1 ⋅s −2. Diagram of torsion balance used in the Cavendish experiment performed by Henry Cavendish in 1798, to measure G, with the help of a pulley, large balls hung from a frame were rotated into position next to the small balls.
A man tuning an upright piano. Piano tuning is the process of adjusting the tension of the strings of an acoustic piano so that the musical intervals between strings are in tune. The meaning of the term 'in tune', in the context of piano tuning, is not simply a particular fixed set of pitches. Fine piano tuning requires an assessment of the ...
The pitches of open strings on a violin. Play ⓘ. In music, the term open string refers to the fundamental note of the unstopped, full string.. The strings of a guitar are normally tuned to fourths (excepting the G and B strings in standard tuning, which are tuned to a third), as are the strings of the bass guitar and double bass.
Comparison of notes derived from, or near, twelve perfect fifths (B ♯). In musical tuning, a temperament is a tuning system that slightly compromises the pure intervals of just intonation to meet other requirements. Most modern Western musical instruments are tuned in the equal temperament system.
This key is more often found in piano music, as the use of all five black keys allows an easier conformity to the player's hands, despite the numerous flats. In particular, the black keys G ♭, A ♭, B ♭, D ♭, and E ♭ correspond to the 5 notes of the G-flat pentatonic scale.
G ♭ (G-flat; also called Ges or sol bémol) is the seventh semitone of the solfège. It lies a diatonic semitone above F and a chromatic semitone below G, thus being enharmonic to F ♯ (F-sharp) or fa dièse. However, in some temperaments, it is not the same as F ♯. G ♭ is a major third below B ♭, whereas F ♯ is a major third above D ...
The Pythagorean A ♭ (at the left) is at 792 cents, G ♯ (at the right) at 816 cents; the difference is the Pythagorean comma. Equal temperament by definition is such that A ♭ and G ♯ are at the same level. 1 ⁄ 4-comma meantone produces the "just" major third (5:4, 386 cents, a syntonic comma lower than the Pythagorean one of 408 cents).