Friction causes a slowdown in motion of plates rubbing against each other.


device used for maintaining orientation or angular velocity, consisting of a wheel or disc whose axis of rotation is free to assume any orientation by…


Scientific study of the physical life of animals and plants.


a long thin, sharp implement usually for piercing, as in sowing, embroidery, acupuncture, tattooing, body-piercing, medical injections, sutras, etc.


an economic situation in which supply exceeds demand

function [mathematics]

a relation in which each element of the domain is associated with exactly one element of the codomain


a bundle of loosely hanging threads, cords, or other material knotted at one end and attached for decoration to home furnishings, clothing, or other items

tuft, tussock

a bunch or collection of threads, grass, hair, etc. held or growing together at the base