Along, cylindrical, electrical heating element of diameter ' 10 mm, thermal conductivity n 240 w/mk, density 2700 kg/m3 , and specific heat fs 900 j/kg k is installed in a duct for which air moves in cross flow over the heater at a temperature and velocity of 27c and 10 m/s, respectively. (a) neglecting radiation, estimate the steady-state surface temperature when, per unit length of the heater, electrical energy is being dissipated at a rate of 1000 w/m.