The lower case letter psi ( ψι), the 23rd letter of the modern Greek alphabet.It represented the consonant cluster /ps/ in the Eastern Greek alphabet and the voiceless aspirated velar plosive /kʰ/ in the Western Greek alphabet (compare Etruscan □ khe). 13 : 25 Moreover, the sum can be extended for any number of state vectors. of the two state vectors where a and b are any complex numbers. Lower-case psi ( ψεῖ), the 23rd letter of the ancient Greek alphabet. The Schrdinger equation is a linear differential equation, meaning that if two state vectors and are solutions, then so is any linear combination.It represented the consonant cluster /ps/ in the Eastern Greek alphabet and the. Otherwise, the distinction may be made by providing the arguments.ĭerived from its majuscule counterpart Ψ. Lower-case psi (), the 23rd letter of the ancient Greek alphabet. Today, while Greek and Latin arent on every students curriculum, the Greek alphabet is learned as needed. Applying a Greek letter to a symbol became second nature. ( quantum physics ) : Some texts use Ψ (uppercase) for the actual wavefunction that appears in the time-dependent Schrödinger equation, and ψ ( =Ψe iEt/ħ) (lowercase) for the time-independent spatial wave function that may exist for stationary states (and which then appears in the time-independent Schrödinger equation), but this distinction is not always observed. A scholar would need a new symbol to represent their new idea and Greek was one of the tools at hand. Definitions In chemistry, IUPAC changed its definition of standard temperature and pressure in 1982: 1 2 Until 1982, STP was defined as a temperature of 273. ( phonetics, dated ) a voiceless retroflex click, IPA ⟨□⟩.is the state vector of the quantum system (being the Greek letter psi), and is an observable, the Hamiltonian operator. ( Christianity ) The Psalms ( a book in the Bible ). Introductory courses on physics or chemistry typically introduce the Schrödinger equation in a way that can be appreciated knowing only the concepts.( astrology, italic ) asteroid (16) Psyche (a stylized □).( physics, biochemistry ) Water potential in cells.It is important to be able to convert between different units of pressure. The atmospheric pressure at sea level is 14.7 psi. Atmospheric pressure is also often stated as pounds per square inch ( psi). ( electrical engineering ) Electric flux. Standard atmospheric pressure is defined as 1 atm of pressure and is equal to 760 mm Hg and 101.3 kPa.Ψ Doke's obsolete symbol for a voiced retroflex click
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