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//Chapter-4,Example4_15_13,pg 4-32
d=2650 //density
Y=8*10^10 //Young's modulus
n=2*10^6 //frequency of wave
k=1 //consider 1st harmonic
t=(k/(2*n))*sqrt(Y/d) //arranging formula of natural frequency
printf("thickness =")
disp(t)
printf("meter")
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