A molybendenum metal pin is 25 mm long and 2mm in diameter. The air surrounding the pin is 200 Degrees C the walls of the room surrounding the pin is 40 degrees C, the pin emissivity is 0.3, and the heat transfer coefficient is 35.0 W/m^2 K. If the initial temperature of the pin is 800 degrees C determine :
A) the initial rate of change of energy storage of the pin, and
B) the initial rate of change of temperature of the pin.