momentum

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Definition/MeaningWord/Phrase
product of the momentum of a rotating body and its distance from the axis of rotation angular momentum
principle that the total linear momentum in a closed system is constant and is not affected by processes occurring inside the system conservation of momentum
(quantum theory) the theory that it is impossible to measure both energy and time (or position and momentum) completely accurately at the same time indeterminacy principle , uncertainty principle
rate of change of momentum is proportional to the imposed force and goes in the direction of the force Newton's second law , Newton's second law of motion , second law of motion
quantum of energy (in a crystal lattice or other system) that has position and momentum and can in some respects be regarded as a particle quasiparticle
propulsion that results from the ejection at high velocity of a mass of gas to which the vehicle reacts with an equal and opposite momentum reaction propulsion
exchange of molecules (and their kinetic energy and momentum) across the boundary between adjacent layers of a fluid or across cell membranes transport
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