Equal in value, measure, force, effect, significance, etc.
From L.L. æquivalentem (nominative æquivalens) "equivalent," p.p. of æquivalere "be equivalent," from L. æquus, → equal + valere "to be worth; be strong."
Hamug-arz, from hamug-, → equi-, + arz stem of arzidan "to be worth," arzân "worthy; of small value, cheap," arj "esteem, honour, price, worth;" Mid.Pers. arz "value, worth," arzidan "be worth," arzân "valuable;" Av. arəjaiti "is worth," arəja- "valuable," arəg- "to be worth;" cf. Skt. arh- "to be worth, to earn," árhant- "worthy person;" Gk. alphanein "to bring in as profit," alphein "to ear, obtain;" Lith. algà "salary, pay;" PIE base *algwh- "to earn; price, value."
Fr.: profondeur équivalente
A measure of the number of particles passing a given point in a → planetary ring per unit time. It is obtained by multiplying the physical width of the ring by its average → optical depth. For the variable-width eccentric rings of → Uranus, equivalent depth remains almost constant around a given ring (Ellis et al., 2007, Planetary Ring Systems, Springer).
→ equivalent; → depth.
Complete set of points in any given space group which are obtained by performing the symmetry operations of the space group on a single point (x, y, z).
→ equivalent; → position.
Fr.: largeur équivalente
1) A measure of the → strength of a
→ spectral line. The equivalent width is the width of a
→ rectangle centered on a spectral line that, on a plot of
→ intensity against → wavelength,
has the same → area as the line.
→ equivalent; → width.
Fr.: logiquement équivalent
Describing two → compound propositions → if and only if they have the same → truth table.
→ logical; → equivalent.
mechanical equivalent of heat
ham-arz-e mekâniki-ye garmâ (#)
Fr.: équivalent mécanique de chaleur
Same as → Joule's constant.
→ mechanical; → equivalent; → heat.
tavân-e ham-arz-e nufé
Fr.: puissance équivalente de bruit
A measure of the sensitivity of an electronic detector, defined as the power input to the detector that will create a signal to noise ratio of one for an integration time of half a second.
→ noise; → equivalent; → power.
Fr.: équivalent TNT
A measure of the explosive strength of a nuclear bomb, expressed in terms of the weight of → trinitrotoluene which could release the same amount of energy when exploded. The Hiroshima atomic (fission) bomb created a blast equivalent to 16 kilotons of TNT. The first hydrogen (thermonuclear) bomb test released an energy of about 10 megatons of TNT. See also → megaton of TNT.