Exa-
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Exa-

Exa is a decimal unit prefix in the metric system denoting 1018 or 1000000000000000000. It was added as an SI prefix to the International System of Units (SI) in 1975,[1] and has the unit symbol E.

Exa comes from the Ancient Greek héx, used as a prefix - hexá-, meaning six (like hexa-), because it is equal to 10006.

Examples:

Prefix Base 1000 Base 10 Decimal English word Adoption[nb 1]
Name Symbol Short scale Long scale
yotta Y  10008  1024 1000000000000000000000000  septillion  quadrillion 1991
zetta Z  10007  1021 1000000000000000000000  sextillion  trilliard 1991
exa E  10006  1018 1000000000000000000  quintillion  trillion 1975
peta P  10005  1015 1000000000000000  quadrillion  billiard 1975
tera T  10004  1012 1000000000000  trillion  billion 1960
giga G  10003  109 1000000000  billion  milliard 1960
mega M  10002  106 1000000  million 1873
kilo k  10001  103 1000  thousand 1795
hecto h  10002/3  102 100  hundred 1795
deca da  10001/3  101 10  ten 1795
 10000  100 1  one -
deci d  1000-1/3  10-1 0.1  tenth 1795
centi c  1000-2/3   10-2 0.01  hundredth 1795
milli m  1000-1  10-3 0.001  thousandth 1795
micro ?  1000-2  10-6 0.000001  millionth 1873
nano n  1000-3  10-9 0.000000001  billionth  milliardth 1960
pico p  1000-4  10-12 0.000000000001  trillionth  billionth 1960
femto f  1000-5  10-15 0.000000000000001  quadrillionth  billiardth 1964
atto a  1000-6  10-18 0.000000000000000001  quintillionth  trillionth 1964
zepto z  1000-7  10-21 0.000000000000000000001  sextillionth  trilliardth 1991
yocto y  1000-8  10-24  0.000000000000000000000001  septillionth  quadrillionth 1991
  1. ^ Prefixes adopted before 1960 already existed before SI. 1873 was the introduction of the CGS system.

See also

References

  1. ^ "Resolution 10 of the 15th meeting of the CGPM (1975)". International Bureau of Weights and Measures. Retrieved .
  2. ^ distance × sin( diameter_angle ), using distance of 5 kpc (15.8 ± 1.1 kly) and angle 36.3', = 172 ± 12.5 ly.
  3. ^ van de Ven, G.; van den Bosch, R. C. E.; Verolme, E. K.; de Zeeuw, P. T. (January II 2006). "The dynamical distance and intrinsic structure of the globular cluster ? Centauri". Astronomy and Astrophysics. 445 (2): 513-543. arXiv:astro-ph/0509228. Bibcode:2006A&A...445..513V. doi:10.1051/0004-6361:20053061. best-fit dynamical distance D=4.8±0.3 kpc ... consistent with the canonical value 5.0±0.2 kpc obtained by photometric methods Check date values in: |date= (help)
  4. ^ "Bitcoinity.org". data.bitcoinity.org. Retrieved .
  5. ^ Bright, Peter (2019-05-07). "Cray, AMD to build 1.5 exaflops supercomputer for US government". Ars Technica. Retrieved .

External links


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

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