Answer
Using the equations on page 345-7.
a) $738Hz$
b) $805Hz$
c and d) $770Hz$.
e) $833Hz$
f) $796Hz$
Work Step by Step
Using the equations on page 345-7.
a) $f_N=\frac{770Hz}{1+\frac{15m/s}{343m/s}}=738Hz$
b) $f_S=\frac{770Hz}{1-\frac{15m/s}{343m/s}}=805Hz$
c and d) $f_E=f_W=770Hz$. They are the same because the wind is blowing from north to south and not to the east or west.
e) $f_N=(770Hz)\frac{343m/s+12m/s}{343m/s-15m/s}=833Hz$
f) $f_W=(770Hz)(1+\frac{12m/s}{343m/s})=796Hz$
