ENGINEERING UNITS OF MEASURE

SI PrefixesSI Prefix Symbol Factor ExampleTera- T 1012 1 T-byte = 1012

bytesGiga- G 109 1 GW = 109 wattsMega- M 106 1 MJ = 106 joulesKilo- k 103 1 km = 103 metersCenti- c 10-2 1 cm = 10-2 metersMilli- m 10-3 1 mA = 10-3

amperesMicro- m 10-6 1 mV = 10-6 voltsNano- n 10-9 1 nm = 10-9 metersPico- p 10-12 1 pm = 10-12

meters

Engineering Units of Measure

Mass kg lb 1kg = 2.2lbs

Length m ft 1in = 2.54cm

Time s s --- Area m2 ft2 ?? Volume m3 ft3 ?? Velocity m/s ft/s ??What are the missing conversions?

Practice Problems Convert the following:

45 m3 = ________ ft3

Practice Problems Convert the following:

120 ft2 = ________ m2

Practice Problems Convert the following:

26 ft/s = ________ m/s

Engineering Units of Measure

Acceleration m/s2 ft/s2

Force N or lbf Energy J or N-m Btu Work J or N-m Btu Power W or J/s Btu/s Pressure Pa or N/m2

psi

Practice Problems Convert the following:

9.8 m/s2 = ________ ft/s2

Practice Problem What engineering term is most likely

associated with the units shown below?

Pressure

Practice Problem What engineering term is most likely

associated with the units shown below?

Energy or Work

Practice Problem What engineering term is most likely

associated with the units shown below?

Power