Water at 290 K and 0.2 kg/s flows through a Teflon tube (k = 0.35 W/m ∙ K) of inner and outer radii equal to 10 and 13 nun, respectively. A thin electrical heating tape wrapped around the outer surface of the tube delivers a uniform surface heat flux of 2000 W/m2, while a convection coefficient of 25 W 1m 2 ∙ K is maintained on the outer surface of the tape by ambient air at 300 K. What is the fraction of the power dissipated by the tape which is transferred to the water? What is the outer surface temperature of the Teflon tube?