# Coefficient-of-drag

noun
1.
.
noun, Aerodynamics.
1.
the ratio of the drag on a body moving through air to the product of the velocity and surface area of the body.

• Coefficient-of-expansion

noun, Physics. 1. the fractional change in length, area, or volume per unit change in temperature of a solid, liquid, or gas at a given constant pressure. noun 1. the amount of expansion (or contraction) per unit length of a material resulting from one degree change in temperature Also called expansivity

• Coefficient-of-fineness

noun, Naval Architecture. 1. . noun, Naval Architecture. 1. the ratio of the immersed volume of a vessel to the product of its immersed draft, length, and beam.

• Coefficient of friction

noun 1. (mechanical engineering) the force required to move two sliding surfaces over each other, divided by the force holding them together. It is reduced once the motion has started coefficient of friction A measure of the amount of resistance that a surface exerts on or substances moving over it, equal to the ratio between […]

• Coefficient-of-performance

noun, Thermodynamics. 1. a constant that denotes the efficiency of a refrigerator, expressed as the amount of heat removed from a substance being refrigerated divided by the amount of work necessary to remove the heat. Abbreviation: COP.

• Coefficient-of-restitution

noun, Physics. 1. the ratio of the relative velocity after impact to the relative velocity before the impact of two colliding bodies, equal to 1 for an elastic collision and 0 for an inelastic collision.

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