1. Engineering Units of Measure

2. SI Prefixes SI Prefix Symbol Factor Example Tera- T 1012
1 T-byte = 1012 bytes
Giga- G
109
1 GW = 109 watts
Mega- M
106
1 MJ = 106 joules
Kilo- k
103
1 km = 103 meters
Centi- c
10-2
1 cm = 10-2 meters
Milli- m
10-3
1 mA = amperes
Micro-
10-6
1 mV = volts
Nano- n
10-9
1 nm = 10-9 meters
Pico- p
10-12
1 pm = meters

3. Engineering Units of Measure
Mass kg lb 1kg = 2.2lbs
Length m ft 1in = 2.54cm
Time s s
Area m2 ft ??
Volume m3 ft ??
Velocity m/s ft/s ??
What are the missing conversions?

4. Practice Problems
Convert the following:
45 m3 = ________ ft3

5. Practice Problems
Convert the following:
120 ft2 = ________ m2

6. Practice Problems
Convert the following:
26 ft/s = ________ m/s

7. Engineering Units of Measure
Acceleration m/s2 ft/s2
Force N or 𝑘𝑔∙𝑚 𝑠 2 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

8. Practice Problems
Convert the following:
9.8 m/s2 = ________ ft/s2

9. Practice Problem Pressure
What engineering term is most likely associated with the units shown below?
𝑘𝑔 𝑚∙𝑠 2
Pressure

10. Practice Problem Energy or Work
What engineering term is most likely associated with the units shown below?
𝑘𝑔∙ 𝑚 2 𝑠 2
Energy or Work

11. Practice Problem Power
What engineering term is most likely associated with the units shown below?
𝑘𝑔∙ 𝑚 2 𝑠 3
Power