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Mass fraction can also be expressed, with a denominator of 100, as percentage by mass (in commercial contexts often called percentage by weight, abbreviated wt.% or % w/w; see mass versus weight). It is one way of expressing the composition of a mixture in a dimensionless size ; mole fraction (percentage by moles , mol%) and volume fraction ...
The equivalent weight of an element is the mass of a mole of the element divided by the element's usual valence. That is, in grams, the atomic weight of the element divided by the usual valence. [2]. For example, the equivalent weight of oxygen is 16.0/2 = 8.0 grams. For acid–base reactions, the equivalent weight of an acid or base is the ...
The mass of an object is a measure of the object’s inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s 2.
Max take-off weight, full power (A340-300 Enhanced) Airbus A380: 0.227 Max take-off weight, full power Boeing 747-8: 0.269 Max take-off weight, full power Boeing 777: 0.285 Max take-off weight, full power (777-200ER) Boeing 737 MAX 8: 0.311 Max take-off weight, full power Airbus A320neo: 0.310 Max take-off weight, full power Boeing 757-200: 0.341
However, in an equal-weight S&P 500 index fund, Microsoft would account for just 0.2 percent of the fund, the same weighting as the other roughly 500 stocks in the fund because each holding is in ...
For example, the 50th percentile (median) is the score below (or at or below, depending on the definition) which 50% of the scores in the distribution are found. A related quantity is the percentile rank of a score, expressed in percent , which represents the fraction of scores in its distribution that are less than it, an exclusive definition.
v. t. e. Body mass index ( BMI) is a value derived from the mass ( weight) and height of a person. The BMI is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m 2, resulting from mass in kilograms (kg) and height in metres (m). The BMI may be determined first by measuring its components by means ...
Any BMI ≥ 35 is severe obesity. A BMI of ≥ 40 is morbid obesity. A BMI of ≥ 50 is extreme obesity. As Asian populations develop negative health consequences at a lower BMI than Western populations, some nations have redefined obesity.
As another example, in a population where the lowest 50% of individuals have no income, and the other 50% have equal income, the Gini coefficient is 0.5; whereas for another population where the lowest 75% of people have 25% of income and the top 25% have 75% of the income, the Gini index is also 0.5.
The weighted arithmetic mean is similar to an ordinary arithmetic mean (the most common type of average ), except that instead of each of the data points contributing equally to the final average, some data points contribute more than others. The notion of weighted mean plays a role in descriptive statistics and also occurs in a more general ...