a sonometer wire having cross section area 0.85×10^-6 is stretched between two rigid supports 1.2 m apart. A tension of 20 N is applied at its free end. If the temperature is reduced by 12℃, calculate the final tension in the wire. Take coefficient of linear expansion and isothermal Young's modulus to be 1.5×10^-5K^-1 and 2.0×x10^11 Nm^-2, respectively.
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Sir, Thank u very much. I got the same question on sonometer
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