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26.3 cm = 2.6 dm – length of average male human foot; 29.98 cm = 2.998 dm – distance light in vacuum travels in one nanosecond; 30 cm = 3.0 dm – maximum leg length of a Goliath birdeater; 31 cm = 3.1 dm – wingspan of largest butterfly species Ornithoptera alexandrae; 32 cm – length of the Goliath frog, the world's largest frog
Earth radius R 🜨 ≈ 6,371 km [9] Lunar distance LD ≈ 384 402 km. [10] Average distance between the center of Earth and the center of the Moon. astronomical unit au. Defined as 149 597 870 700 m. [11] Approximately the distance between the Earth and Sun. light-year ly ≈ 9 460 730 472 580.8 km.
Many people tend to walk at about 1.42 metres per second (5.1 km/h; 3.2 mph; 4.7 ft/s). [ 1 ] [ 2 ] [ 3 ] Individuals may find slower or faster speeds uncomfortable. Horses have also demonstrated normal, narrow distributions of preferred walking speed within a given gait , which suggests that the process of speed selection may follow similar ...
The impact crater is more than 5 miles (8 kilometers) deep. Scientists hope that returning samples to Earth will help answer enduring questions about the intriguing far side, which hasn’t been ...
Although most contemporary accounts used an Arabic mile of 6 444 feet (1,964 metres), which gave a Spanish league of the degree of 25,776 feet (7,857 metres or 4.242 modern nautical miles) others defined an Arabic mile as just 6,000 feet making a Spanish league of the degree 24,000 feet (or 7,315 metres, almost exactly 3.95 modern nautical miles).
Kos may also refer to roughly 1.8 kilometres (1.1 mi) [6] Arthashastra standard unit of kos or krosha is equal to 3075 metres in SI units and 1.91 miles in imperial units. [ 7 ] [ dubious – discuss ]
It was only in 1867 that the term "kilometer " became the only official unit of measure in the Netherlands to represent 1000 metres. [ 10 ] Two German textbooks dated 1842 [ 11 ] [ 12 ] and 1848 [ 13 ] respectively give a snapshot of the use of the kilometre across Europe: the kilometre was in use in the Netherlands and in Italy, and the ...
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