Showing 1-50 of 61 results

…Occurring continuously over a period of time…

…the constant background noise of the city…

…The constant of proportionality in the gas equation. It is equal to 8.314 joule kelvin−1 mole−1…

…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 which 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 1−1e (approximately 0.6321)…

…they kept up a ceaseless flow of questions…

…the constant background noise of the city…

…the service has been disrupted by continual breakdowns…

…for the past few days there had been continuous rain…

…she stayed faithful all her married life…

…she was loyal to her country…

…it may seem hard to believe, but I can assure you it's true…

…A constant used in numerical analysis, approximately equal to 0.577216. It represents the limit of the series 1 + 12 + 13 + 14 ... 1n − ln 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 metre…

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

…A constant representing the strength of the interaction between a particle and a field…

…The quantity of electric charge carried by one mole of electrons (equal to roughly 96,490 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)…

…The concentration of a given substrate which catalyses the associated reaction at half the maximum rate…

…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 joules…

…A constant, 1.097 x 107 m−1, which 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…

…(apostrophe, one capital)…

…The ratio of the gas constant to Avogadro’s constant, 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, which 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 × 10−11 N m2 kg−2…

…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 joules…

…The ratio of the gas constant to Avogadro’s constant, 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…

…, Edwin Powell (1889–1953), American astronomer, who proposed Hubble's law and Hubble's constant…

…(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)…