// chapter 1 , Example1 5 , pg 22
l=50*10^-3//length of rod(in m)
d=7250//density(in  kg/m^3)
E=11.5*10^10//youngs modulus(in N/m^2)
n=sqrt(E/d)/(2*l)//natural frequency
printf("Natural frequency of rod\n")
printf("n=%.2f KHz",n*10^-3)