A brass wire 1.8 m long at `27^@C` is held when taut with little tension between two rigid supports. If the wire is cooled to a temperature - `39^@C`, what is the tension developed in the wire, if tis diameter is 2.0 mm? Coefficient of linar expansion of brass ` = 2.0 xx 10^5 ^@C^-1`, Young's modulus of brass ` = 0.91 xx 10^11 Pa`.