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UNIT DEFINITIONS MKS (SI) unit system <br /> I. Base units <br />' ml 1L kg = 1M sec = 1T coul = 1Q <br /> II. Angular measure <br /> rad = 1 7r <br /> deg rad <br /> 180 <br /> III Derived units: Length <br /> an = .01-m km = 1000-M mm = .001-M <br /> ft 'm .3048•m in 2.54• cm yd = 3- ft mi 5280• ft <br /> IV. Derived units: Mass <br /> -3 <br /> 1 gm = 10 -kg tonne m 1000• kg ib m 453.59247• gm <br /> (metric ton) (use convention that lb <br /> lb represents pounds mass. <br /> oz- m ton = 2000• lb <br /> 16 ("short" ton) slug m 32.174- lb <br /> ry <br /> V. Derived units: Time <br /> min = 60• sec hr 3600• sec day = 24- hr <br /> yr = 365.2422• day (tropical year) <br /> VI. Derived units: Area, Volume <br /> 4 2 2 , <br /> hectare = 10 •m acre = 4840 yd <br /> � a <br /> 3 -3 <br /> liter = (.1-m) mL m 10 • liter <br /> (Sometimes defined with 3 <br /> °L°Symbol.) fl oz m 29.57353- cm <br /> gal m 128• fl–oz <br /> -8 2 <br /> darty = 10 cm <br /> VII. Derived units: Velocity, Acceleration <br /> mi km <br />+' mph kph = — 3 <br /> hr hr ft <br /> cfm = <br /> ---- min <br /> m <br /> g 1 9.80665• (acceleration of gravity) <br /> 2 <br /> k sec <br /> VIII. Derived units: Force, Energy, Power <br /> m -5 <br /> newton kg- dyne 10 • newton lbf g• lb <br /> 2 (pound force) <br /> j . <br />