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Horses are used to measure distances in horse racing – a horse length (shortened to merely a length when the context makes it obvious) equals roughly 8 feet or 2.4 metres. Shorter distances are measured in fractions of a horse length; also common are measurements of a full or fraction of a head, a neck, or a nose. [10]
The first American-made pocket-sized calculator, the Bowmar 901B (popularly termed The Bowmar Brain), measuring 5.2 by 3.0 by 1.5 inches (132 mm × 76 mm × 38 mm), came out in the Autumn of 1971, with four functions and an eight-digit red LED display, for US$240, while in August 1972 the four-function Sinclair Executive became the first ...
One way to make large numbers or small fractions easier to read, is to use unit prefixes. At some point in time though, the need to relate the two units might arise, and consequently the need to choose one unit as defining the other or vice versa. For example, an inch could be defined in terms of a barleycorn. A system of measurement is a ...
A further reduction of backing to 0.5 or 0.75 mils (13 or 19 μm) and total thickness to 26 micrometres (1.0 mil) resulted in double-play tapes of 2,400 feet (730 m) on a seven-inch reel. [1] This and thinner tapes were not commonly used on ten-and-a-half-inch reels, as the tape was too fragile for the angular momentum of the larger reels ...
In issue 33, Mad published a partial table of the "Potrzebie System of Weights and Measures" developed by 19-year-old Donald E. Knuth, later a famed computer scientist. According to Knuth, the basis of this new revolutionary system is the potrzebie, which equals the thickness of Mad issue 26, or 2.263 348 451 743 817 321 6473 mm. [4]
This means they have had a disproportionate contribution to historical sea level rise and are set to contribute a smaller, but still significant fraction of sea level rise in the 21st century. [140] Observational and modelling studies of mass loss from glaciers and ice caps show they contribute 0.2-0.4 mm per year to sea level rise, averaged ...
British settlers in Hyde Park woke up to snow "nearly 1 in (2.5 cm) deep", with the meteorological table in The Sydney Herald recording that on the morning of the snow the temperature dropped to 3 °C (37 °F). [15] 1857. New England Cold wave of 1857. January 1857 was the coldest month ever recorded in New England.
Ejection fraction can then be obtained by dividing the volume ejected by the heart (stroke volume) by the volume of the filled heart (end-diastolic volume). [86] Echocardiograms can also be conducted under circumstances when the body is more stressed, in order to examine for signs of lack of blood supply.