LENGTH AND VOLUME
1 inch = 2.54 cm
1 foot = 30.48 cm
1 meter = 39.37 inches
1 mile = 1.6093440 kilometers
1 liter = 10000 cubic centimeters = .010 cubic meters
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PRESSURE
1 Pa = 1 N/m squared
1 atom = 101325 Pa
1 milimeter Hg = 133.3 Pa
1 lb/in.^ 2 = 6895 Pa
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TIME
1 year = 365 1/4 day = 3.1558 X 10^ 7
1 day = 87,400 seconds
1 hour = 3600 seconds
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ENERGY AND POWER
1 Joule = 0.239 calories
1 kWh = 3.60 X 10^ 6; J
1 eV = 1.602 X 10^ -19 J
1 u = 931.49432 MeV
1 hp = 746 Watts
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MASS
1 kilogram = 1000 grams
1 u = 1.6605402 X 10^ -27 kilograms
1 kilogram has a weight of 2.205 lb
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SPEED
1 m/s = 3.60 km/h = 2.24 mi/h
1 km/h = 0.621 mi/h
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FORCE
1 lb = 4.448 Newtons
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ANGLE
1 radian = 57.3� = 0.159 revolution
1 revolution = 2 pi (radian) = 360�
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COMMON PREFIXES
10^ 12 tera T
10^ 9 giga G
10^ 6 mega M
10^ 3 kilo k
10^ -2 centi c
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10^ -3 milli m
10^ -6 micro �
10^ -9 nano n
10^ -12 pico p
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