Question: You have a 4 cm diameter infinitely long bar at a uniform temp of 70 C that is placed in a liquid which is 300

You have a 4 cm diameter infinitely long bar at a uniform temp of 70 C that is placed in a liquid which is 300 C. The convective coefficient of heating is 30 W/m2K; what is the time required to heat the bar to 130 C? Assume k=15 W/mK, density is 600 kg/m3 and cp = 1200 J/kgK

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