The drug coefficient `C_(v)` of an automobile is determined from the experssion `C_(D)=(D)/((1)/(2)pv^(2)S)`
Where D is the drag force experimentally determined in a wind tunnel, p is the air density, v is the speed of the air in the wind tunnel, and S is the cross-sectional area of the car presented to the air flow. Determine the dimension of `C_(D)` in lenght.

Explanation

`[C_(D)]=([D])/([p][V^(2)][S])=([M^(1)L^(1)T^(-2)])/([M^(1)L^(-3)][L^(2)T^(-2)][L^(2)])`
`[M^(@)L^(@)T^(@)]`
`therefore` dimension in L is zero.