Symbol Definition 



X Extraneous force in x direction 



X Coordinate, usually horizontal 



Xq Equilibrium position of particle, 

 horizontal coordinate 



Horizontal displacement of part- 

 X icles from equilibrium position 



Y Extraneous force in y direction 



J A coordinate, usually vertical 



Jq Equilibrium position of particle, 



vertical coordinate 



Vertical displacement of particle 

 J from equilibrium position 



Z Extraneous force in z direction 

 Also: Section modulus per length 

 of wall 



Z. Time between successive weather 

 maps 

 Al^o; Greenwich mean time 



z A coordinate, usually horizontal, 

 perpendicular to x and y 



(J Angle of wave crest to bottom con- 

 ( alpha) tours 



Also! Angle of wave approach, mea- 

 sured between the shore line 

 and the line of wave advance 



Also: Angle between gradient and 

 surface winds 



Also: Phase difference between axis 

 of "f" and "g" terms in dif- 

 fraction theory 



Basic 

 Unit 

 (in F,L, 

 T System) 



F 



L 



Example in 

 English Units 



pounds 



feet 



feet 



L 



feet 



F 



pounds 



L 



feet 



feet 



L 



feet 



F 



pounds 



l3/l 



ft2 



T 



hours 



T 



hours 



feet 



degrees 



degrees 

 degrees 



radians 



Skewness coefficient 



