…a fundamental truth or proposition that serves as the foundation for a system of belief or behaviour or for a chain of reasoning…
…as a general idea or plan, although the details are not yet established…
…because of or in order to demonstrate one’s adherence to a particular belief…
…the principle that members of a hierarchy are promoted until they reach the level at which they are no longer competent…
…the hypothesis that a body’s inertial mass results from its interaction with the rest of the matter in the universe…
…yearning for a state of oblivion, as a manifestation of the death instinct…
…the instinctive drive to seek pleasure and avoid pain, expressed by the id as a basic motivating force which reduces psychic tension…
…the control by the ego of the pleasure-seeking activity of the id in order to meet the demands of the external world…
…the cosmological principle that theories of the universe are constrained by the necessity to allow human existence…
…a law stating that a body totally or partially immersed in a fluid is subject to an upward force equal in magnitude to the weight of fluid it displaces…
…the principle in hydrodynamics that an increase in the velocity of a stream of fluid results in a decrease in pressure. Also called Bernoulli effect or Bernoulli theorem…
…a basic postulate of general relativity, stating that at any point of space-time the effects of a gravitational field cannot be experimentally distinguished from those due to an accelerated frame of reference…
…the principle that the momentum and position of a particle cannot both be precisely determined at the same time…
…the characteristic doctrine of logical positivism, that a statement which cannot be verified is strictly meaningless…
…the principle that states that for very large quantum numbers the laws of quantum theory merge with those of classical physics…
…the principle that the introduction of a new product or process whose ultimate effects are disputed or unknown should be resisted. It has mainly been used to prohibit the importation of genetically modified organisms and food…
…a principle stating that if a constraint (such as a change in pressure, temperature, or concentration of a reactant) is applied to a system in equilibrium, the equilibrium will shift so as to tend to counteract the effect of the constraint…
…the scientific principle that things are usually connected or behave in the simplest or most economical way, especially with reference to alternative evolutionary pathways…
…the assertion that no two fermions can have the same quantum number…
…the principle that one (and one only) of two contradictory propositions must be true…
…the assertion that no two fermions can have the same quantum number…
