Phase
Phase or phases may refer to:
In science
In physics
- Phase transition is the transformation of a thermodynamic system from one phase to another
- Mobile phase and Stationary phase in chromatography
- Phase space formulation, a formulation of quantum mechanics in phase space
- Single-phase electric power, distribution of AC electric power in a system where the voltages of the supply vary in unison
-
Three-phase electric power, a common method of AC electric power generation, transmission, and distribution
- Three-phase, the mathematics of three-phase electric power
Planetary phase
Refers to the periods of time during which a planet's surface reflects different amounts of sunlight, revealing different portions of the planet's surface from the perspective of a given point in space.
Inferior planets
The two inferior planets, Mercury and Venus, which have orbits that are smaller than the Earth's, exhibit the full range of phases as does the Moon, when seen through a telescope. Their phases are "full" when they are at superior conjunction, on the far side of the Sun as seen from the Earth. (It is possible to see them at these times, since their orbits are not exactly in the plane of Earth's orbit, so they usually appear to pass slightly above or below the Sun in the sky. Seeing them from the Earth's surface is difficult, because of sunlight scattered in Earth's atmosphere, but observers in space can see them easily if direct sunlight is blocked from reaching the observer's eyes.) The planets' phases are "new" when they are at inferior conjunction, passing more or less between the Sun and the Earth. (Sometimes they appear to cross the solar disk, which is called a transit of the planet.) At intermediate points on their orbits, these planets exhibit the full range of crescent and gibbous phases.
Phase (waves)
Phase in sinusoidal functions or in waves has two different, but closely related, meanings. One is the initial angle of a sinusoidal function at its origin and is sometimes called phase offset or phase difference. Another usage is the fraction of the wave cycle that has elapsed relative to the origin.
Formula
The phase of an oscillation or wave refers to a sinusoidal function such as the following:
where 
, 
, and 
are constant parameters called the amplitude, frequency, and phase of the sinusoid. These functions are periodic with period 
, and they are identical except for a displacement of 
along the 
axis. The term phase can refer to several different things:
, in which case we would say the phase of 
is , and the phase of 
is 
., in which case we would say and have the same phase but are relative to their own specific references.
, or its principal value, is referred to as instantaneous phase, often just phase.Phrase (disambiguation)
A phrase may be a linguistic expression or a constituent in the grammatical analysis of a sentence.
Phrase may also refer to:
Phrase (rapper)
Harley Webster (born 1981) – better known as Phrase – is an Australian hip hop MC, originating from Melbourne.
History
Phrase began to piece together an album with producers Daniel Merriweather and J-Skub (Jan Skubiszewki), while working part-time for the Reach Youth foundation, an organisation that Phrase credits with helping him overcome behavioural problems he had in his mid-teens. The album, Talk with Force was picked up for national release by Universal Music Australia in 2005. Three singles were released from this album, "Here Now" featuring Mystro, "Catch Phrase" featuring Daniel Merriweather, and "Hold On" featuring labelmate Max White.
In 2007 he founded the record label Crooked Eye with DJ Flagrant and J-Skub. The label's first release was a mixtape by Melbourne MC Illy (which Phrase also appears on). The same year, he released the non-album single "Face It" featuring Ian Kenny from Karnivool and Birds of Tokyo; which was used in the marketing campaign for the Australian release of Halo 3
Podcasts:
