Let qs be the dynamic pressure of the slower fluid moving with velocity vs ,and let qf be the dynamic pressure of the faster fluid moving with velocity vf .Then vf=1.5vs. Given the equation q=
1
2
nv2 substituting the dynamic pressure and velocity of the faster fluid gives qf=
1
2
nvf2 Since vf=1.5vs the expression 1.5vs can be substituted for vf in this equation, giving qf=
1
2
n(1.5vs)2 This can be rewritten as qf=(2.25)
1
2
nvs2=(2.25)qs.Therefore, the ratio of the dynamic pressure of the faster fluid is
qf
qs
=
2.25qs
qs
=2.25 Either 2.25 or the equivalent improper fraction