Tera-
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Tera is a unit prefix in the metric system denoting multiplication by 1012 or 1000000000000 (one trillion short scale; one billion long scale). It has the symbol T. Tera is derived from Greek word τέρας teras, meaning "monster".[1] The unit prefix was confirmed for use in the International System of Units (SI) in 1960.
Examples of its use:
- terahertz radiation: electromagnetic waves within the band of frequencies from 0.3 to 3 THz. Visible light is around 500 THz.
- terabit and terabyte, units used in data storage.
- teragram: equal to 109 kg. The Great Pyramid of Giza has a mass of about 6 Tg.
- terasecond: approximately 31,558 years
- teralitre: equal to 109 m3. Lake Zurich contains about 4 TL of water.
- terawatt: used to measure total human energy consumption. In 2010 it was 16 TW (TJ/s).
- terametre (= 1,000,000,000 km): Light travels 1.079 Tm in one hour.
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- ↑ Prefixes adopted before 1960 already existed before SI. 1873 was the introduction of the CGS system.
See also
References
- ↑ C. Upward, G. Davidson, The History of English Spelling, Wiley-Blackwell (2011)
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