//chapter4,Example4_3,pg 84

P=1

l=40*10^-3

E=115*10^9

D=7.25*10^3

n=(P/(2*l))*sqrt(E/D)

printf("natural frequency\n")

printf("n=%.2f Hz",n)

printf("\nfrequency of rod is more than audible range, rod cannot be used in magnetostriction oscillator\n")