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From Freepedia

To help compare different orders of magnitude this page lists lengths between 10 and 100 km (10⁴ to 10⁵ m).

Distances shorter than 10 km

Contents 1 Conversions 2 Sports 3 Human-built structures 4 Nature 5 Astronomical 6 See also

Conversions

10 km is equal to:

• 10,000 metres
• 6.2 miles
• 1 mil, unit of measure commonly used in Norway and Sweden
• 1 farsang, unit of measure commonly used in Iran and Turkey

Sports

• 42 km — length of a marathon course

Human-built structures

• 18 km — cruising altitude of Concorde
• 38 km — Length of the world's longest bridge, the Second Lake Pontchartrain Causeway in Louisiana, USA
• 39 km — undersea portion of the Channel tunnel

Nature

• 10 km — Height of Mauna Kea in Hawaii, measured from its base on the ocean floor
• 11 km — deepest known point of the ocean, Challenger Deep in the Mariana Trench
• 21 km — length of Manhattan
• 34 km — Narrowest width of the English Channel

Astronomical

• 13 km — mean diameter of Deimos, the smaller moon of Mars
• 20 km — diameter of Leda, one of Jupiter's moons
• 20 km — diameter of Pan, one of Saturn's moons
• 27 km — Height of Olympus Mons on Mars, measured from its base
• 43 km — diameter difference of Earth's equatorial bulge
• 66 km — diameter of Naiad, the innermost of Neptune's moons

Distances longer than 100 km

See also

• Orders of magnitude (length)