Yotta-
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Yotta-

Yotta is the largest decimal unit prefix in the metric system, denoting a factor of 1024 or 1000000000000000000000000; that is, one million million million million, or one septillion. It has the unit symbol Y. The prefix name is derived from the Ancient Greek ? (októ), meaning "eight", because it is equal to (103)8. It was added as an SI prefix to the International System of Units (SI) in 1991.[1]

Usage examples:

  • The mass of the Earth is 5,972.6 Yg.[2]
  • The mass of the oceans is about 1.4 Yg.[3]
  • The total power output of the Sun is approximately 385 YW.[4]
  • The observable universe is estimated to be 880 Ym in diameter.[5]
  • One yottabyte (YB) is a unit of digital information or information storage capacity that contains one septillion bytes or 1,000 zettabytes. The yobibyte (YiB) is a related unit that uses a binary prefix, and means 1,0248 bytes, which is approximately 1.2 septillion bytes.

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 4 of the 19th CGPM (Conférence Générale des Poids et Mesures)". BIPM (Bureau International des Poids et Mesures).
  2. ^ Williams, David R. "Earth fact sheet". Earth fact sheet. NASA. Retrieved 2015.
  3. ^ Kennish, Michael J. (2001). Practical handbook of marine science. Marine science series (3rd ed.). CRC Press. p. 35. ISBN 0-8493-2391-6.
  4. ^ "WolframAlpha: the Sun's total power output in yottawatts".
  5. ^ "WolframAlpha: size of universe in yottameters".

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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