Mechanics of Fluids

APPENDIX
Units and conversion
1
factors
Table A1.1 Prefixes for multiples and submultiples of SI units
Prefix Symbol Factor by which
unit is multiplied
yotta Y 10 24
zetta Z 10 21
exa E 10 18
peta P 10 15
tera T 10 12
giga G 10 9
mega M 10 6
kilo k 10 3
hecto h 10 2
deca da 10
deci d 10 −1
centi c 10 −2
milli m 10 −3
micro µ 10 −6
nano n 10 −9
pico p 10 −12
femto f 10 −15
atto a 10 −18
zepto z 10 −21
yocto y 10 −24
Table A1.2 SI Units with internationally agreed names
Quantity Unit Symbol Relationship
Force newton N 1 N = 1kg· m · s −2
Pressure (and stress) pascal Pa 1 Pa = 1N· m −2 = 1kg· m −1 · s −2
Energy and work joule J 1 J = 1N· m = 1kg· m 2 · s −2
Power watt W 1 W = 1J· s −1 = 1kg· m 2 · s −3
Frequency hertz Hz 1 Hz = 1s −1