(obvious)

(obvious)

Quadrivium(latin)Arithmetic

Geometry

Music

Astronomy (astrology)Septem artes liberales (seven liberal arts), curriculum

Trivium (cf.

trivial): Grammar, Rhetoric, Dialectic (Logic)Magic numbers: 3

^{2}+ 4^{2}= 5^{2}Early universities: Bologna (founded in 1088), Padova (founded in 1222)

Quantum mechanicsPlanck constant

h= 6.626 × 10^{-34}J s

E=h v

Quattrocento(italian)The 15

^{th}century (1401 - 1500 or 1400 - 1499) in italy (mature Renaissance).

Quintessence(latin: quinta essentia, 5th element besides fire, water, air, earth)

Quisisana(italian)Lago di Como (Lario): Villa Vigoni

Ravello: Villa Cimbrone (Belvedere), Villa Palumbo, Villa Rufolo

Quisquilien(latin, german)

Quod erat demonstrandum(q.e.d., latin)The Natural Numbers [1, 2, 3, ...]. The Peano axioms.

Quodlibet(latin)

QSymbol for heat in thermodynamics.

First law: d

U= dW+ dQ. Second law: dS= dQ_{rev}/T; dS>= 0. Third law: www.nernst.de.Symbol for electric charge.

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Revised 2009-05-17