# Shared Flashcard Set

## Details

Engineering Variables
Letters Used to Represent Engineering Quantities
27
Engineering
02/27/2008

Term
 A
Definition
 This variable represents AREA. Its SI unit is m2
Term
 a
Definition
 This variable represents ACCELERATION. Its SI unit is m/s2
Term
 act
Definition
 This letter and its subscript represent CENTRIFUGAL ACCELERATION. Its SI unit is m/s2
Term
 d
Definition
 This variable represents DIAMETER. Its SI unit is meters.
Term
 E
Definition
 This variable represents ENERGY. Its SI unit is Joules.
Term
 Ek(Say "E sub k")
Definition
 This variable represents KINETIC ENERGY. Its SI unit is Joules.
Term
 Ep(Say "E sub p")
Definition
 This variable represents POTENTIAL ENERGY. Its SI unit is Joules.
Term
 F
Definition
 This variable represents FORCE. Its SI unit is Newtons.
Term
 Fcf (say "F sub cf")
Definition
 This variable represents CENTRIFUGAL FORCE. Its SI unit is Newtons.
Term
 G
Definition
 This variable represents WEIGHT. Its SI unit is Newtons.
Term
 g
Definition
 This variable represents acceleration due to gravity. On earth it is equal to 9.8 m/s2
Term
 h
Definition
 This variable represents HEIGHT. Its SI unit is Meters.
Term
 l
Definition
 This variable represents LENGTH. Its SI unit is Meters.
Term
 m
Definition
 This variable represents MASS. Its SI unit is Kilograms.
Term
 n
Definition
 This variable represents revolutions per second. Its SI unit is s-1, which means "per second"
Term
 P
Definition
 This variable represents POWER. Its SI unit is Watts.
Term
 r
Definition
 This variable represents RADIUS. Its SI unit is meters.
Term
 V
Definition
 This variable represents VOLUME. Its SI unit is m3 or Liters.
Term
 α,β(alpha, beta)
Definition
 These variables are commonly used to denote ANGLES. SI units include radians and degrees.
Term
 t
Definition
 This variable represents TIME. Its SI unit is seconds.
Term
 f
Definition
 This variable represents FREQUENCY. Its SI unit is Hertz.
Term
 ω
Definition
 This variable represents ANGULAR VELOCITY. Its SI unit is radians per second.
Term
 a
Definition
 This variable represents ACCELERATION. Its SI unit is m/s2.
Term
 p
Definition
 This variable represents pressure. Its SI unit is the Pascal
Term
 Pabs (say "p sub abs")
Definition
 This variable represents ABSOLUTE PRESSURE. Its SI unit is the Pascal.
Term
 P.S.I.G.
Definition
 Pounds Per Square Inch Gauge. This is a measure of pressure relative to atmospheric pressure. At atmospheric pressure, this gauge will read zero.
Term
 P.S.I.A.
Definition
 Pounds Per Square Inch Absolute. This pressure is referenced to perfect vacuum. At atmospheric pressure, this guage would read 14.7 p.s.i.g.
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