A long copper wire, 0.8 cm in diameter, is suddenly exposed to an air stream at a temperature of T? = 37°C. The thermal conductivity of the wire is k = 400 W/(m*K), the density is ? = 8900 kg/m3, and the heat capacity is cp= 385 J/(kg*K). If the convection coefficient is 50 W/(m2*K), long does it take for the wire to heat from 280K to 297K?