1 hectometre
From Infogalactic: the planetary knowledge core
A clickable mosaic of objects
at scales within direct human experience, from the micrometric (10−6 m, top left) to the multi-kilometric (105 m, bottom right).
at scales within direct human experience, from the micrometric (10−6 m, top left) to the multi-kilometric (105 m, bottom right).
British driver location sign and location marker post on the M27 in Hampshire. The location marker posts are installed at 100-metre intervals[1]
To compare different orders of magnitude this page lists lengths between 100 metres and 1000 metres (1 kilometre).
Contents
Conversions
100 metres (sometimes termed a hectometre) is equal to:
- 328 feet
- one side of a 1 hectare square
- a fifth of a modern li, a Chinese unit of measurement
- the approximate distance travelled by light in 300 nanoseconds
Human-defined scales and structures
- 100 metres – wavelength of the highest mediumwave radio frequency, 3 MHz
- 100 metres – spacing of location marker posts on British motorways
- 138.8 metres – height of the Great Pyramid of Giza (Pyramid of Cheops)
- 139 metres – height of the world's tallest roller coaster, Kingda Ka[2]
- 187 metres– shortest wavelength of the broadcast radio AM band, 1600 kHz
- 202 metres – length of the Széchenyi Chain Bridge connecting Buda and Pest
- 320.75 metres – height of the Eiffel Tower(including antenna) [3]
- 328 metres – height of Auckland's Sky Tower, the tallest free-standing structure in the Southern Hemisphere[when?]
- 341 metres – height of the world's tallest bridge, the Millau Viaduct[when?]
- 390 metres – height of the Empire State Building
- 400–800 metres – approximate heights of the world's tallest skyscrapers of the past 80 years[when?]
- 458 metres – length of the Knock Nevis, the world's largest supertanker
- 555 metres – longest wavelength of the broadcast radio AM band, 540 kHz
- 630 metres – height of the KVLY-TV mast, second tallest structure in the world
- 646 metres – height of the Warsaw radio mast, the world's tallest structure until its collapse in 1991
- 828 metres – height of Burj Khalifa, world's tallest structure on 17 January 2009[4]
- 1000 metres – wavelength of the lowest mediumwave radio frequency, 300 kHz
Sports
- 100 metres – the distance a very fast human being can run in about 10 seconds
- 100.584 metres – length of a Canadian football field between the goal lines (110 yards)
- 91.5 metres – 137 metres – length of a soccer field[5]
- 105 metres – length of a typical football field
- 109.73 metres – total length of an American football field (120 yards, including the end zones)
- 110 – 150 metres the width of an Australian football field
- 135 – 185 metres the length of an Australian football field
- 137.16 metres – total length of a Canadian football field, including the end zones (150 yards)
Nature
- 115.5 metres – height of the world's tallest tree in 2007, the Hyperion sequoia[6]
- 310 metres – maximum depth of Lake Geneva
- 340 metres – distance sound travels in air at sea level in one second; see speed of sound
- 979 metres – height of the Salto Angel, the world's highest free-falling waterfall (Venezuela)
Astronomical
- 270 metres – length of 99942 Apophis
- 535 metres – length of 25143 Itokawa,[7] a small asteroid visited by a spacecraft
Notes
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