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The earth atmosphere's scale height is about 8.5 km, as can be confirmed from this diagram of air pressure p by altitude h: At an altitude of 0, 8.5, and 17 km, the pressure is about 1000, 370, and 140 hPa, respectively.
The increase in altitude necessary for P or ρ to drop to 1/e of its initial value is called the scale height: H = R T M g 0 {\displaystyle H={\frac {RT}{Mg_{0}}}} where R is the ideal gas constant, T is temperature, M is average molecular weight, and g 0 is the gravitational acceleration at the planet's surface.
Draught beer and cider must be sold by the imperial pint, and milk in returnable bottles can be sold by the imperial pint. Many people measure their height in feet and inches and their weight in stone and pounds, to give just a few examples. Imperial units are used in many other places, for example, in many Commonwealth countries that are ...
Scale length may refer to: Length scale (or "scale length"), a significant concept in physics used to define the order of magnitude of a system Scale height (or "scale length"), a specific parameter in physics denoting the distance over which a quantity decreases by a factor of e
The long scale is used by most Continental European countries and by most other countries whose languages derive from Continental Europe (with the notable exceptions of Albania, Greece, Romania, [46] and Brazil). These countries use a word similar to billion to mean 10 12.
The atomic length scale is ℓ a ~ 10 −10 m and is given by the size of hydrogen atom (i.e., the Bohr radius, approximately 53 pm).; The length scale for the strong interactions (or the one derived from QCD through dimensional transmutation) is around ℓ s ~ 10 −15 m, and the "radii" of strongly interacting particles (such as the proton) are roughly comparable.
A scale is a related set of pitches (not necessarily exact) that can be used as a compositional unit. It differs from a tuning or temperament since the latter is a system for tuning an instrument. The chromatic scale can be played in Pythagorean tuning , meantone temperament , or 12-tone equal temperament , or indeed many different types of ...
Height is the vertical distance above a reference point, commonly the terrain elevation. In UK aviation radiotelephony usage, the vertical distance of a level, a point or an object considered as a point, measured from a specified datum ; this is referred to over the radio as height , where the specified datum is the airfield elevation (see QFE ...