Multiple Prefix Abbreviation Alpha a Nu n
Beta b Xi j
1024 yotta Y
Gamma g Omicron o
1021 zetta Z
1018 exa E Delta d Pi p
1015 peta P Epsilon e, e Rho r
1012 tera T Zeta z Sigma s
109 giga G Eta h Tau t
106 mega M Theta u Upsilon y
103 kilo k Iota i Phi f
102 hecto h
Kappa k Chi x
101 deka da
Lambda l Psi c
101 deci d
Mu m Omega v
102 centi c
103 milli m
106 micro m
109 nano n
1012 pico p
1015 femto f
Mathematical Symbols
1018 atto a
1021 zepto z
is equal to
1024 yocto y
is defined by
* Commonly used prefixes are in bold. All prefixes are pronounced with the
is not equal to
accent on the first syllable.
is approximately equal to
is of the order of
Terrestrial and Astronomical Data*
is proportional to
is greater than
Acceleration of gravity g 9.81 m/s2 32.2 ft/s2
at Earth’s surface is greater than or equal to
Radius of Earth RE RE 6371 km 3959 mi
is much greater than
Mass of Earth ME 5.97 1024 kg ! is less than
Mass of the Sun 1.99 10 kg 30 " is less than or equal to
Mass of the moon 7.35 1022 kg !! is much less than
Escape speed 11.2 km/s 6.95 mi/s x change in x
at Earth’s surface
dx differential change in x
Standard temperature and 0°C 273.15 K
x absolute value of x
pressure (STP) 1 atm 101.3 kPa
v
S S
magnitude of v
Earth–moon distance† 3.84 108 m 2.39 105 mi
Earth–Sun distance (mean)† 1.50 1011 m 9.30 107 mi n! n(n 1)(n 2)…1
Speed of sound in dry air (at STP) 331 m/s sum
Speed of sound in dry air 343 m/s lim limit
(20°C, 1 atm) t → 0 t approaches zero
3
Density of dry air (STP) 1.29 kg/m dx derivative of x with
Density of dry air (20°C, 1 atm) 1.20 kg/m3 dt respect to t
Density of water (4°C, 1 atm) 1000 kg/m3 #x partial derivative of x
Heat of fusion of water (0°C, 1 atm) Lf 333.5 kJ/kg #t with respect to t
Heat of vaporization of water Lv 2.257 MJ/kg x2
(100°C, 1 atm) f(x)dx
x1
definite integral
x2
* Additional data on the solar system can be found in Appendix B and at F(x) ` F(x2 ) F(x1 )
http://nssdc.gsfc.nasa.gov/planetary/planetfact.html. x1
†
Center to center.
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