Page 803 - Fundamentals of Water Treatment Unit Processes : Physical, Chemical, and Biological

758 Pre-Appendix Tables

TABLE CDQR.2
Units and Conversions—Quick Reference
Quantity Symbol From Units Factor To Units Values
Base SI units
Length L ft 0.3048 m
mil 25.4 mm
angstrom 1 10 10 m
angstrom 1 10 4 mm
angstrom 1 10 1 nm
dm 10 m
Time t s
Mass M lbm 0.44535 924 kg
slug 14.593 90 kg
slug 32.17 Lbm
ounces (avoir) 0.028 349 52 kg
ton (metric) 1000 kg
Electric current I ampere (A)
Thermodynamic temperature T kelvin (K)
Amount of matter n mole (mol)
Luminous intensity candela (cd)
Derived Units
Area A hectare 10 000 m 2
hectare 100 km 2
acre 4046.873 m 2
mi 2 2.589 998 10 6
ft 2 0.092 90 m 2
ft 2 0.09290304 m 2
2 4 2
in 6.451 600 10 m
Concentration
Molarity M mols=L
[*] mols=L
Molality mols=kg solvent
Concentration mg=L 1=1000MW mols=L
g=gal 17.711806 mg=L
Density r slug=ft 3 515.379 kg=m 3
slug=ft 3 32.174 Lb=ft 3
Lb=ft 3 16 021.59 mg=L
Lb=ft 3 16.02159 kg=m 3
2 2
Energy J 1.0 kgm =s Nm
J 1.0 volt-coulomb Nm
J 1.0 watt-s Nm
J 10 7 erg
J 9.9 10 3 L-atm
J 1.0365 10 5 volt-faraday
J 6.242 10 18 eV
calorie (thermo) 4.184 J
ft lbf 1.355 818 J
volt-coulomb 1.0 J
kW-h 3600 000 J
watt-h 3600 J
Btu (thermo) 1055.35 J
7
watt s 2.7778 10 kWh
btu 1.055056 kJ