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Helicity is a pseudo-scalar quantity: it changes sign under change from a right-handed to a left-handed frame of reference; it can be considered as a measure of the handedness (or chirality) of the flow. Helicity is one of the four known integral invariants of the Euler equations; the other three are energy, momentum and angular momentum.
English: 1The new standard tuning of Robert Fripp and his Guitar Craft (Guitar Circle)—also called C-major pentatonic tuning or Guitar Craft tuning ("Crafty" tuning). The diagrams provide basic chords for a beginning guitarist. With the accompanying audio files (especially the WAV file), the chords sample the harmonic palette of new standard ...
In a song in C major, if a composer treats another key as the tonic (for example, the ii chord, D minor) for a short period by alternating between A7 (the notes A, C#, E and G) and D minor, and then returns to the tonic (C major), this is a tonicization of the key of D minor. However, if a song in C major shifts to the key of D minor and stays ...
In the key of C major, these would be: D minor, E minor, F major, G major, A minor, and C minor. Despite being three sharps or flats away from the original key in the circle of fifths, parallel keys are also considered as closely related keys as the tonal center is the same, and this makes this key have an affinity with the original key.
The helicity of a particle is positive (" right-handed") if the direction of its spin is the same as the direction of its motion and negative ("left-handed") if opposite. Helicity is conserved. [1] That is, the helicity commutes with the Hamiltonian, and thus, in the absence of external forces, is time-invariant. It is also rotationally ...
e♭–b♭–f–c–g–d–a–e–b–f♯–c♯–g♯ This succession of eleven 3:2 intervals spans across a wide range of frequency (on a piano keyboard , it encompasses 77 keys). Since notes differing in frequency by a factor of 2 are perceived as similar and given the same name ( octave equivalence ), it is customary to divide or ...
Tonic and tonic counter parallel in C major: CM and Em chords Play ⓘ. Tonic and tonic counter parallel in C minor: Cm and A ♭ M chords Play ⓘ. Contrast chord example Play ⓘ: C major and E minor contrast through their respective notes C and B (in red and orange), each a half step apart or leading tones. The chords share two notes (in ...
h f = head loss in meters (water) over the length of pipe; L = length of pipe in meters; Q = volumetric flow rate, m 3 /s (cubic meters per second) C = pipe roughness coefficient; d = inside pipe diameter, m (meters) Note: pressure drop can be computed from head loss as h f × the unit weight of water (e.g., 9810 N/m 3 at 4 deg C)