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The terametre (SI symbol: Tm) is a unit of length in the metric system equal to 1 000 000 000 000 meters (10 12 m). To help compare different distances, this section lists lengths starting at 10 12 m (1 Tm or 1 billion km or 6.7 astronomical units). ≈1 Tm – 6.7 au – diameter of the red supergiant Betelgeuse based on multiple angular ...
10 24: 1 000 000 000 000 000 000 000 000: zetta Z 10 21: 1 000 000 000 000 000 000 000: exa E 10 18: 1 000 000 000 000 000 000: peta P 10 15: 1 000 000 000 000 000: tera T 10 12: 1 000 000 000 000: giga G 10 9: 1 000 000 000: mega M 10 6: 1 000 000: kilo k 10 3: 1 000: hecto h 10 2: 100 deca da 10 1: 10 (none) (none) 1 deci d 10 −1: 0.1 centi ...
Very differing definitions, 10, 12, 14, 15, 18 or 20 feet, varied between approx. 3 and 5 m. Wegstunde – 'Way's hour', one hours travel (by foot), used up to the 18th century. In Germany 1 ⁄ 2 Meile or 3.71 km, in Switzerland 16000 feet or 4.8 km
The siriometer is an obsolete astronomical measure equal to one million astronomical units, i.e., one million times the average distance between the Sun and Earth. [13] This distance is equal to about 15.8 light-years, 149.6 Pm, or 4.8 parsecs, and is about twice the distance from Earth to the star Sirius. [14]
Legua nautica (nautical league): Between 1400 and 1600 the Spanish nautical league was equal to four Roman miles of 4,842 feet, making it 19,368 feet (5,903 metres or 3.1876 modern nautical miles). However, the accepted number of Spanish nautical leagues to a degree varied between 14 1/6 to 16 2/3, so in actual practice the length of a Spanish ...
circle is 10 cm wide on a computer display, viewing it from 10.3 m (11.3 yards) away will show true representation of the sizes. Since antiquity, the arcminute and arcsecond have been used in astronomy : in the ecliptic coordinate system as latitude (β) and longitude (λ); in the horizon system as altitude (Alt) and azimuth (Az); and in the ...
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An example of such a problem might be If 6 builders can build 8 houses in 100 days, how many days would it take 10 builders to build 20 houses at the same rate?, and this can be set up as 8 houses 100 days 6 builders = 20 houses x 10 builders , {\displaystyle {\frac {\frac {8\ {\text{houses}}}{100\ {\text{days}}}}{6\ {\text{builders}}}}={\frac ...