A wire of density 9 ×103 kg/m3 is stretched between two clamps 1 m apart and is stretched to an extension of 4.9 ×10-4 m. Young's modulus of material is 9 ×1010N m. Then:

Speed of wave in wireV=TρA=YΔllA×1ρA=YΔllρMinimum frequency; that means fundamental mode.f=Vλ=V2l=12lYΔllρ=35Hz Stress =YΔll=9×1010×4.9×10−41=4.41×107N/m2and frequency of first overtone = 2f=70 Hz.