Tera-

From HandWiki

Tera- (/ˈtɛrə/; symbol T) is a metric prefix denoting a factor of a short-scale trillion or long-scale billion (1012 or 1000000000000).[1] It was adopted in the International System of Units (SI) in 1960. The prefix is derived from the Greek word τέρας (téras), meaning "monster".[2]

Exponentiation

  • 1 Tm2 means one square terametre, or the size of a 1000000000000 m × 1000000000000 m square (1024 m2), not 1000000000000 square metres (1012 m2).
  • 1 Tm3 means one cubic terametre, or the size of a 1000000000000 m × 1000000000000 m × 1000000000000 m cube (1036 m3), not 1000000000000 cubic metres (1012 m3)

Computing

In computing, tera- may sometimes refer to 240 (10244 or 1099511627776) instead of 1012, such as in data storage units like the terabyte (TB). The binary prefix tebi- (/ˈtɛbɪ-/; symbol Ti) has been adopted by the International Electrotechnical Commission (IEC) to signify 240 and avoid this ambiguity.[3] JEDEC however still uses tera- for 240 in its memory standards.[4]

Common usage

Computing

Electromagnetism

Energy and power

  • terajoule (TJ): used to express energy yields of large events, such as nuclear explosions or earthquakes.
  • terawatt (TW): used in measuring global electrical generation and consumption.
    • Worldwide installed solar capacity reached several terawatts in 2022.[5]
    • Peak power of a 30-microsecond lightning strike.
  • terawatt-hour (TW⋅h or TWh): common unit for large-scale electrical energy production or consumption.

See also

References

  1. ↑ "SI Brochure – 9th ed./version 3.02". https://www.bipm.org/en/search?p_p_id=search_portlet&p_p_lifecycle=2&p_p_state=normal&p_p_mode=view&p_p_resource_id=%2Fdownload%2Fpublication&p_p_cacheability=cacheLevelPage&_search_portlet_dlFileId=41483053&_search_portlet_priv_r_p_selectedFacetType=bipm-common-committee_sortable&_search_portlet_priv_r_p_javax.portlet.action=search&_search_portlet_priv_r_p_p_p_lifecycle=1&_search_portlet_priv_r_p_selectedFacetValue=BIPM&_search_portlet_priv_r_p_displayRawValue=true&_search_portlet_priv_r_p_operation=selectFacet. 
  2. ↑ "tera-". https://ahdictionary.com/word/search.html?q=tera. 
  3. ↑ "Definitions of the SI units: The binary prefixes". https://physics.nist.gov/cuu/Units/binary.html. 
  4. ↑ "Memory standards". https://www.jedec.org/standards-documents. 
  5. ↑ "Yearly electricity data" (in en-US). 2024-01-04. https://ember-climate.org/data-catalogue/yearly-electricity-data/. 
Prefix Base 10 Decimal English word Adoption[nb 1]
Name Symbol Short scale Long scale
yotta Y  1024 1000000000000000000000000  septillion  quadrillion 1991
zetta Z  1021 1000000000000000000000  sextillion  trilliard 1991
exa E  1018 1000000000000000000  quintillion  trillion 1975
peta P  1015 1000000000000000  quadrillion  billiard 1975
tera T  1012 1000000000000  trillion  billion 1960
giga G  109 1000000000  billion  milliard 1960
mega M  106 1000000  million 1873
kilo k  103 1000  thousand 1795
hecto h  102 100  hundred 1795
deca da  101 10  ten 1795
 100 1  one –
deci d  10−1 0.1  tenth 1795
centi c  10−2 0.01  hundredth 1795
milli m  10−3 0.001  thousandth 1795
micro μ  10−6 0.000001  millionth 1873
nano n  10−9 0.000000001  billionth  milliardth 1960
pico p  10−12 0.000000000001  trillionth  billionth 1960
femto f  10−15 0.000000000000001  quadrillionth  billiardth 1964
atto a  10−18 0.000000000000000001  quintillionth  trillionth 1964
zepto z  10−21 0.000000000000000000001  sextillionth  trilliardth 1991
yocto y  10−24  0.000000000000000000000001  septillionth  quadrillionth 1991
  1. ↑ Prefixes adopted before 1960 already existed before SI. 1873 was the introduction of the CGS system.



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