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4.7 × 10 −9: 2.9 × 10 −9: 4.3 × 10 −18: Average rate of the Moon receding from the Earth (approx. 38 mm/yr). [citation needed] 4.8 × 10 −9: 1.7 × 10 −8: 1.1 × 10 −8: 1.6 × 10 −17: Human hair growth (average rate—note that there is a great range of variation). 10 −7: 3 × 10 −7 to 1.11 × 10 −5: 1.08 × 10 −6 to 4 ...
The maximum terminal hair length depends on the length of the anagen (period of hair growth) for the individual. Waist-length hair or longer is only possible to reach for people with long anagen. The anagen lasts between 2 and 7 years, for some individuals even longer, and is followed by shorter catagen (transition) and telogen (resting) periods.
17 μm – minimum width of a strand of human hair [25] 17.6 μm – one twip, a unit of length in typography; 10 to 55 μm – width of wool fibre [92] 25.4 μm – 1/1,000 inch, commonly referred to as 1 mil in the U.S. and 1 thou in the UK; 30 μm – length of a human skin cell; 30.8568 μm – 1 zeptoparsec
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Terminal velocity is the maximum speed attainable by an object as it falls through a fluid (air is the most common example). It is reached when the sum of the drag force ( F d ) and the buoyancy is equal to the downward force of gravity ( F G ) acting on the object.
In this case, the terminal velocity increases to about 320 km/h (200 mph or 90 m/s), [citation needed] which is almost the terminal velocity of the peregrine falcon diving down on its prey. [4] The same terminal velocity is reached for a typical .30-06 bullet dropping downwards—when it is returning to earth having been fired upwards, or ...
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A bob cut, also known as a bob, is a short to medium length haircut for women, in which the hair is typically cut straight around the head at approximately jaw level, and no longer than shoulder-length, often with a fringe at the front. The standard bob cut exposes the back of the neck and keeps all of the hair well above the shoulders.