Showing 1-39 of 39 results

…Occurring continuously over a period of time…

…the constant background noise…

…The constant of proportionality in the gas equation. It is equal to 8.314 joule kelvin1 mole1…

…Either of two constants occurring in a pair of equations relating the radial and tangential velocities of a star in the Galaxy to its distance from the sun.…

…A coefficient of proportionality relating the rate of a chemical reaction at a given temperature to the concentration of reactant (in a unimolecular reaction) or to the product of the concentrations of reactants…

…A time that represents the speed with which a particular system can respond to change, typically equal to the time taken for a specified parameter to vary by a factor of 11e (approximately 0.6321)…

…A constant used in numerical analysis, approximately equal to 0.577216. It represents the limit of the series 1 + 12 + 13 + 14 + ...1n − (natural logarithm of n), as n tends to infinity. It is not known whether this is a rational number or not…

…The rate at which energy reaches the earth’s surface from the sun, usually taken to be 1,388 watts per square meter…

…= dissociation constant; (also especially in later use) the reciprocal of the dissociation constant.…

…A measure of the strength of interaction between two particles, or between a particle and a field…

…The quantity of electric charge carried by one mole of electrons (equal to 96.49 coulombs)…

…The ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer. The reciprocal of the constant is called Hubble time and represents the length of time for which the universe has been expanding, and hence the age of the universe…

…(1905–51), English composer, conductor, and critic; full name Leonard Constant Lambert. He wrote the music for the ballet Romeo and Juliet (1926) and the jazz work The Rio Grande (1929), later becoming musical director of Sadler’s Wells (1930–47)…

…A fixed number associated with an ionic crystalline solid, usually defined for materials with a halite-like crystal lattice as the product of potential energy per constituent ion and the inter-ionic distance divided by the square of the electronic charge, and analogously for materials with other crystal structures.…

…The concentration of a given enzyme that catalyzes the associated reaction at half the maximum rate…

…The universal gravitational constant; the constant of proportionality in Newton's law of gravitation.…

…A fundamental constant, equal to the energy of a quantum of electromagnetic radiation divided by its frequency, with a value of 6.626 × 10−34 joule-seconds…

…A constant, 1.097 x 107 m−1, that appears in the formulae for the wave numbers of lines in atomic spectra and is a function of the rest mass and charge of the electron, the speed of light, and Planck’s constant…

…The ratio of the gas constant to Avogadro’s number, equal to 1.381 × 10-23 joules per kelvin in the case where the number of molecules is equal to Avogadro’s number…

…An arbitrary constant in the field equations of general relativity…

…A quantity measuring the ability of a substance to store electrical energy in an electric field…

…A quantity expressing the extent to which a particular substance in solution is dissociated into ions, equal to the product of the concentrations of the respective ions divided by the concentration of the undissociated molecule…

…A fundamental and dimensionless physical constant, equal to approximately 1137, that occurs in expressions describing the fine structure of atomic spectra…

…The constant in Newton’s law of gravitation relating gravity to the masses and separation of particles, equal to 6.67 × 1011N m2 kg2…

…An unvarying specific individual.…

…The dissociation constant of an ionic compound, such as an acid, base, or salt.…

…A quantity representing the loss of amplitude, or the retardation of phase, of a wave per unit distance travelled; specifically the coefficient of the distance in an equation representing the propagation of a wave.…

…A number representing the speed of radioactive decay, equal to the probability of a nucleus decaying in unit time; symbol λ.…

…The multiplication factor of a fission process.…

…The constant ratio of one variable quantity to a second to which it is proportional.…

…= gas constant.…

…A fundamental constant, equal to the energy of a quantum of electromagnetic radiation divided by its frequency, with a value of 6.626 × 10−34 joule-seconds…

…The number of atoms or molecules in one mole of a substance, equal to 6.023 × 1023…

…The number of atoms or molecules in one mole of a substance, equal to 6.023 × 1023…

…The ratio of the gas constant to Avogadro’s number, equal to 1.381 × 10-23 joules per kelvin in the case where the number of molecules is equal to Avogadro’s number…

…A quantity related to the size of a microscopic particle, equal to the terminal outward velocity of the particle when centrifuged in a fluid medium divided by the centrifugal force acting on it, expressed in units of time…

…A quantity related to the size of a microscopic particle, equal to the terminal outward velocity of the particle when centrifuged in a fluid medium divided by the centrifugal force acting on it, expressed in units of time…

…Attributive and in the genitive. Used with reference to an electro-optical effect in certain crystals similar to the Kerr effect in liquids; especially in Pockels cell, Pockels constant, Pockels effect.…

…(1905–51), English composer, conductor, and critic; full name Leonard Constant Lambert. He wrote the music for the ballet Romeo and Juliet (1926) and the jazz work The Rio Grande (1929), later becoming musical director of Sadler’s Wells (1930–47)…