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The metabolic equivalent of task (MET) is the objective measure of the ratio of the rate at which a person expends energy, relative to the mass of that person, while performing some specific physical activity compared to a reference, currently set by convention at an absolute 3.5 mL of oxygen per kg per minute, which is the energy expended when sitting quietly by a reference individual, chosen ...
Volume may be measured either in terms of units of cubic length or with specific volume units. The units of cubic length (the cubic inch, cubic foot, cubic mile, etc.) are the same in the imperial and US customary systems, but they differ in their specific units of volume (the bushel, gallon, fluid ounce, etc.).
The practice of using grams or ounces depending on the size is also common in states that have legalized marijuana. For example, California allows possession of "an ounce" (legally rounded to 28.5 g) of recreational marijuana but only 8 g of concentrate. [77] The strength of a tab of LSD is almost always expressed in micrograms. [citation needed]
Metric measuring spoons, 1–125 ml Measuring Spoons, ⅛–1 tablespoon Micro scoops for measuring milligram units of compounds; 6–10 mg (black), 10–15 mg (red), 25–30 mg (yellow) A measuring spoon is a spoon used to measure an amount of an ingredient, either liquid or dry, when cooking. Measuring spoons may be made of plastic, metal ...
Dry measure cups without a scale are sometimes used, in sets typically of 1/4, 1/3, 1/2, and 1 cup. The units may be milliliters or fractions of a liter, or the cup (unit, with varying definitions) with its fractions (typically 1/4, 1/3, 1/2, 2/3, and 3/4), pints, and often fluid ounces.
Balance scale set, with weights Scales used to measure the weight of fruit in a supermarket Weighing scale in use in Tokyo Digital kitchen scale, a strain gauge scale Weighing scale for a baby includes a ruler for height measurement. A scale or balance is a device used to measure weight or mass. These are also known as mass scales, weight ...
The cup was rarely used in practice, as historically most kitchens tended to be equipped with scales and ingredients were measured by weight, rather than volume. [14] A related measure, the gill (5 fluid ounces, or half an imperial cup), was commonly used in older cookbooks for liquids, and may still be used (in fractions of 1 ⁄ 4 , 1 ⁄ 5 ...
The unit of time should be the second; the unit of length should be either the metre or a decimal multiple of it; and the unit of mass should be the gram or a decimal multiple of it. Metric systems have evolved since the 1790s, as science and technology have evolved, in providing a single universal measuring system.