A particular aspect of the mechanical response of rubber, observed under cyclic loading conditions with small strain amplitudes, and manifested as a dependence of the viscoelastic storage modulus on the amplitude of the applied strain.

The phenomenon whereby the path of a spinning object moving through a fluid is deflected in a manner that is not observed when the object is not spinning, explained by the difference in pressure of the fluid on opposite sides of the object.

(sciences, economics) Something that occurs only once a critical threshold has been reached.

A visual illusion wherein the first position of a moving object entering a window is misperceived.

(business) The idea that production costs decrease by a constant percentage whenever production doubles, attributed to improvements in performance as a result of frequent repetition.

A temporal perceptual illusion that can arise when observers judge the elapsed time between sensory stimuli applied sequentially at different locations. Subjects tend to overestimate the time between stimuli when the distance between the stimuli is large, and to underestimate the time when the distance is small.

A spatial perceptual illusion that arises when observers judge the distance between consecutive stimuli in a sequence. When the distance between stimuli is constant but the time between stimuli is not, subjects tend to misperceive the shorter temporal interval as being accompanied by a shorter spatial interval.

A counterintuitive physical phenomenon observed with a chain of beads placed inside a jar: when one end of the chain is yanked from the jar and allowed to fall to the floor, it establishes a self-sustaining flow of the chain which rises up into an arch as if being sucked by an invisible siphon.

Synonym of stack effect

The phenomenon of air buoyancy leading to the movement of air into and out of buildings, chimneys, etc., which may drive natural ventilation, air infiltration, and fires.