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The act or fact of persisting; the quality of being persistent.
Verbal noun from → persist.
Persisting, especially in spite of opposition, obstacles, discouragement, etc.; persevering (Dictionary.com).
Adjective from → persist.
1) A latent ability that may or may not be developed; possibility.
From L.L. potentialis "potential," from L. potentia "power," potis "powerful, able, capable;" cognate with Av. paiti- "lord, husband;" Mod.Pers. -bad (sepah-bad "general, commander of an army"); Skt. páti- "master, husband;" Gk. posis "husband;" Lith. patis "husband."
Tavand, from tav- + -vand. The first component tav-
is the stem of tavân "power, strength," tavânestan "to be powerful,
able;" variants tâv, tâb, (dialects) tew "power;" Mid.Pers. tuwan
"power, might;" O.Pers. tav- "to have power, to be strong, to be able,"
tauman- "power, strength," tunuvant- "powerful;"
Av. tauu- (tu-) "to be able, strong,"
tavah- "power," təviši- "strength" (Mod.Pers.
tuš "power, ability");
Skt. tavi- "to be strong, to have authority,"
tavas-, tavisa- "strong, energetic," tavisi- "power, strength;"
Gk. taus, saos "healthy;" L. tumere "to be swollen;" PIE
*teu- "to swell, be strong." The second component -vand
a suffix of adjectives and agent nouns, → actual.
Fr.: barrière de potentiel
Region in a field of force in which the potential is such that a particle, which is subject to the field, encounters opposition to its passage.
Fr.: densité potentielle
Of a fluid parcel at pressure P, the density that it would acquire if adiabatically brought to a reference pressure.
Fr.: différence de potentiel
Between two points, the work done in taking the unit test object from one point to the other. Potential is a scalar quantity.
→ potential; → difference.
Fr.: énergie potentielle
Of a system, the work done in changing the system from some standard configuration to its present state. Thus, if a body of mass m is raised vertically through a height h, the work done, mgh, is the increase in potential energy.
potential energy curve
xam-e kâruž-e tavand
Fr.: courbe de l'energie potentielle
A plot that displays the → potential energy of a moving body as a function of its position. It is explained by the → conservation of energy and the conversion of potential energy into → kinetic energy and vice versa.
Fr.: champ de potentiel
A field that has a → potential. A continuous → vector fieldA in a domain D is a potential field in D if and only if its → work around every closed curve C contained in D is zero: ∫A.ds = 0. Examples include the → gravitational field and the → electrostatic field.
Fr.: gradient de potentiel
At a point, the rate of change of potential V, with distance x, measured in the direction in which the variation is a maximum. The intensity F of the field is proportional to the potential gradient, but is oppositely directed: F = -dV/dx.
Fr.: puit de potentiel
Region in a → field of force in which the potential decreases abruptly, and in the surrounding region of which the potential is larger.
1) The state or quality of being potential. Something potential.
With a possibility of becoming actual; possibly.
potentially hazardous asteroid (PHA)
seyyârak-e tavandâné âpenâk
Fr.: astéroÃ¯de potentiellement dangereux
An asteroid that could make a threatening close approach to the Earth. In technical terms a PHA is defined as having an → absolute magnitude of 22 or brighter and an → Earth Minimum Orbit Intersection Distance (MOID) of less than 0.05 → astronomical unit or 7.5 million km.
→ potentially; → hazardous; → asteroid.
An instrument for measuring electrical quantities by balancing an unknown potential difference against a known potential difference.
Fr.: Tables pruténiques
A set of astronomical tables (→ ephemeris) created in 1551 by Erasmus Reinhold (1511-1553), professor of astronomy at Wittenberg, indicating the positions of the Sun, the Moon, and the planets on the basis of the → Copernican model of heliocentric solar system. They superseded the → Alfonsine Tables, but since circular orbits were used, they were no more accurate than those tables. They were themselves replaced by the → Rudolphine Tables.
From original L. title Tabulae prutenicae "Prussian Tables," such named because Albert I, Duke of Prussia, supported Reinhold and financed the printing; → table; → zij.
Fr.: intensité de rayonnement
A measure of the amount of radiation emitted from a point expressed as the radiant flux per unit solid angle leaving this source.
Fr.: tenseur relatif
A generalized tensor concept that is characterized by a → Jacobian matrix of transformation raised to a power called → weight of a tensor density. In practice, only relative tensors of weight 1 or -1 are used. The product of a relative tensor of weight -1 by another tensor of weight 1 is an → absolute tensor. Same as → tensor density.
Fr.: potentiel retardé
The → electromagnetic potential at an instant in time and a point in space as a function of the charges and currents that existed at earlier times.
Fr.: tenseur de Ricci
A → rank 2, → symmetric tensor Rμν that is a contraction of the → Riemann curvature tensor Rλμνλ. More specifically, Rμν ≡ Σ (λ) Rλμνκ = Rλμνκ. Closely related to the Ricci tensor is the → Einstein tensor, which plays an important role in the theory of → general relativity.
Named after the Italian mathematician Gregorio Ricci-Curbastro (1853-1925); → tensor.
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