prings in a suspension system of automobiles are made of steel rods heated and wound into coils while ductile.Consider steel rods (ρ= 7832kg/m3, cp= 434 J/kg K, and k = 63.9 W/m K) with diameter of 2.5cm and length of 1.27m. The steel rods are heated in an oven with a uniform convection heat transfer coefficient of 20 W/m2K. The steel rods were heated from an initial temperature of 20 C to the desired temperature of 450 C before being wound into coils. Determine the ambient temperature in the oven, if the steel rods were to be heated to the desired temperature within 10 minutes.