10**xx Prefix Comment
10**30 quetta Q
10**27 ronna R
10**24 yotta Y
10**21 zetta Z
10**18 exa E Exaflop computing was the state of the art
circa 2022.
See Sophia Chen, 2024, Nature magazine:
"A day in the life of the world's fastest supercomputer".
0.01 exameters ≅ 1 light-year.
10**15 peta P Petaflop computing was the state of the art
circa 2018.
10**12 tera T The world power use is about 18 Terawatts
circa 2019 (see Wikipedia: Watt: Terawatt).
10**9 giga G A gigayear (Gyr) is a billion years.
10**6 mega M Who wants to be a meganaire?
10**3 kilo k
10**2 hecto h As far as I know only used, sort of, for
hectare (ha):
1 ha = 100 x 100 = 10**4 m**2 = (1/100) km**2
10**1 deka da
10**0 The basic unit case: i.e., the NO prefix case
10**(-1) deci d Only commonly used for decibels.
10**(-2) centi c
10**(-3) milli m Never confuse mJ and MJ.
10**(-6) micro μ The Greek letter μ (mu).
10**(-9) nano n Nanotechnology is very hot circa 2013.
10**(-12) pico p
10**(-15) femto f Used for
ultrashort pulse lasers (AKA femtosecond lasers).
10**(-18) atto a
10**(-21) zepto z
10**(-24) yocto y
10**(-27) ronto r
10**(-30) quecto q
Note:
Some of the