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On this scale, the distance to Alpha Centauri A would be 276 kilometers (171 miles). The fastest outward-bound spacecraft yet sent, Voyager 1, has covered 1/390 of a light-year in 46 years and is currently moving at 1/17,600 the speed of light. At this rate, a journey to Proxima Centauri would take 75,000 years.
For the middle of the journey the ship's speed will be roughly the speed of light, and it will slow down again to zero over a year at the end of the journey. As a rule of thumb, for a constant acceleration at 1 g (Earth gravity), the journey time, as measured on Earth, will be the distance in light years to the destination, plus 1 year. This ...
Multiple means of transport, inspired by Jules Verne [9] George Francis Train: 67 days, 12 hours, 3 minutes 18 March 1890 24 May 1890 By ships and trains, from Tacoma, Washington [8] [10] George Francis Train: 64 days 9 May 1891 12 July 1891 By ships and trains, from Fairhaven, Washington [8] J. Willis Sayre: 54 days 9 hours and 42 minutes 1903 ...
Motorized transportation is permitted over water and where otherwise needed, but the human-powered distance must be a minimum of 18,000 miles (29,000 km) to qualify for a world record, according to Guinness rules since 2013. [citation needed] Thomas Stevens was the first person to circle the globe by bicycle. The feat was accomplished between ...
It is the solution of the optimal transport problem, which in turn is also known as the Monge-Kantorovich problem, or sometimes the Hitchcock–Koopmans transportation problem; [3] when the measures are uniform over a set of discrete elements, the same optimization problem is known as minimum weight bipartite matching.
The curve of fastest descent is not a straight or polygonal line (blue) but a cycloid (red).. In physics and mathematics, a brachistochrone curve (from Ancient Greek βράχιστος χρόνος (brákhistos khrónos) ' shortest time '), [1] or curve of fastest descent, is the one lying on the plane between a point A and a lower point B, where B is not directly below A, on which a bead ...
Comparative passenger capacity per hour of various modes of transport. The corridor capacity in the passenger transport field refers to the maximum number of people which can be safely and comfortably transported per unit of time over a certain way with a defined width. The corridor capacity does not measure the number of vehicles which can be ...
The metabolic cost of transport includes the basal metabolic cost of maintaining bodily function, and so goes to infinity as speed goes to zero. [1] A human achieves the lowest cost of transport when walking at about 6 kilometres per hour (3.7 mph), at which speed a person of 70 kilograms (150 lb) has a metabolic rate of about 450 watts. [1]