Page 804 - Fundamentals of Water Treatment Unit Processes : Physical, Chemical, and Biological

Pre-Appendix Tables 759

TABLE CDQR.2 (continued)
Units and Conversions—Quick Reference
Quantity Symbol From Units Factor To Units Values
3
100 ft natural 108 720 000 J
gas 108 720 KJ
0.10872 GJ
30.2 kWh
1.030713 therms US
25 073 529.55 g-cal.
Electrical
Electric charge Q coulomb 1.0 A s
A s
Electric potential V volt 1.0 J=C
¼ Nm=(As)
¼ W=A
2 3
Electrical conductance G siemens (S) 1.0 A=V A s =kg m 2
2 4 2
Electrical capacitance C farad (F) 1.0 C=V A s =(kg m )
2
¼ A s=V ¼ C =J ¼ As=V
Electrical resistance V ohm 1.0 ¼ V=A
siemens 1.0 A=V S ¼ A=V
mho 1.0 siemens
coulomb 2.7778 10 4 A-h
coulomb 1.0363 10 5 faraday
faraday 96 487 coulomb
electron volt 1.6022 10 19 J
Frequency hertz (Hz) 1.0 s 1
3
Flow Q mgd 0.043 8078 m =s
3
gpm 0.000 063 090 20 m =s
3
3
ft =min 0.000 4719 m =s
3
3
ft =s 0.028 316 85 m =s
3
3
m =s 35.314 667 ft =s
3
3
Flow per unit length Q=L ft =min=ft length 0.001 548 m =s=m length
3
3
ft =s=ft length 0.092 903 m =s=m length
3
3
m =s=m length 10.76385 ft =s=ft length
Force F N 1 kgm=s 2
kg m=s 2 1 N Definition
kgm 9.806 650 N Force of 1.0 kg
mass on earth
N 0.2248 Lbf
kg-force 9.806 650 N
Lbf 4.448 222 N
Lbf 32.17 poundal
poundal 0.13826 N
ozf 0.278 N
2
Kinematic viscosity n stoke 1 cm s 1
2
stoke 0.0001 m =s
Mass grain 6.479 891 10 5 kg
0.064 798 g
64.798 91 mg
2 3
Power P watt 1 kg m =s
watt 1 Nm=s
horsepower 745.6999 W (J=s)
ft lbf=s 1.355 818 W
Power intensity P=V hp=mgd 0.197 kW=mL=d
hp=ft 3 26.33 kW=m 3
(continued)