flow

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flow

a measurement of quantity over a specified period of time. Unlike a STOCK, which is not a function of time, a flow measures quantity passing per minute, hour, day or whatever. A common analogy is to a reservoir. The water entering and leaving the reservoir is a flow but the water actually in the reservoir at any one point in time is a stock. INCOME is a flow but WEALTH is a stock.
References in periodicals archive ?
27L), Maximum Expiratory Flow rate between 25-75 % of vital capacity (MEF 25-75 %, 5.
Lung volumes, maximum expiratory flow rates and gas exchange in patients with MTB Lung volumes Measurement Mean value [+ or -] SD FRC 91.
5] Even in teenagers who have smoked only a few years, maximum expiratory flow volume curves demonstrate decreases in flow rates at small lung volumes [6] yet another expression of small airway obstruction.

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