dimensionless ratio

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• Dimensionless quantity — In dimensional analysis, a dimensionless quantity or quantity of dimension one is a quantity without an associated physical dimension. It is thus a pure number, and as such always has a dimension of 1.[1] Dimensionless quantities are widely used… …   Wikipedia

• Dimensionless physical constant — In physics, a dimensionless physical constant (sometimes fundamental physical constant) is a universal physical constant that is dimensionless having no unit attached, so its numerical value is the same under all possible systems of units. The… …   Wikipedia

• Ratio — This article is about the mathematical concept. For the Swedish institute, see Ratio Institute. For the academic journal, see Ratio (journal). For the philosophical concept, see Reason. For the legal concept, see Ratio decidendi. The ratio of… …   Wikipedia

• Urea reduction ratio — For the Scottish river see: Urr Water The urea reduction ratio (URR), is a dimensionless number used to quantify hemodialysis treatment adequacy.DefinitionURR = frac{U {pre} U {post{U {pre imes 100% Where: * Upre is the pre dialysis urea level *… …   Wikipedia

• Sharpe ratio — The Sharpe ratio or Sharpe index or Sharpe measure or reward to variability ratio is a measure of the excess return (or risk premium) per unit of deviation in an investment asset or a trading strategy, typically referred to as risk (and is a… …   Wikipedia

• aspect ratio — a dimensionless ratio expressing how elongated the shape of a flat organ is. In the case of the caudal fin, a high aspect ratio is found in fast swimmers. Calculated as the ratio of height squared to the surface of the fin …   Dictionary of ichthyology

• Mass-to-charge ratio — Charge to Mass ratio SI quantity dimension: M/(I⋅T) SI unit: kg/C other units: Th The mass to charge ratio ratio (m/Q) is a physical quantity that is widely used in the electrodynamics of c …   Wikipedia

• Gyromagnetic ratio — In physics, the gyromagnetic ratio (also sometimes known as the magnetogyric ratio in other disciplines) of a particle or system is the ratio of its magnetic dipole moment to its angular momentum, and it is often denoted by the symbol γ, gamma.… …   Wikipedia

• Damping ratio — Classical mechanics Newton s Second Law History of classical mechanics  …   Wikipedia

• Thrust-to-weight ratio — is, as its name suggests, the ratio of instantaneous thrust to weight (where weight means weight at the Earth’s surfaceSutton (7th edition pg 442) thrust to weight ratio F/Wg is a dimensionless parameter that is identical to the acceleration of… …   Wikipedia

• Mixing ratio — In chemistry and physics, the dimensionless mixing ratio is defined as the abundance of one component of a mixture relative to that of all other components. The term can refer either to mole ratio or mass ratio.[1] Mole ratio In atmospheric… …   Wikipedia