In: Physics
An industrial process requires a 10.0 Kg Iron bar to be at heated to a temperature of TF = 1100.0 C before a forging process can proceed. The induction heater that is used during the process produces a power output of P = 50,000 watts or (j/s) to heat the bar.
a) If the bar starts at a temperature of Ti = 20.0 C how much energy is required to raise the temperature of the bar to the working temperature of TF = 1100 C? The specific heat of Iron is CI = 450.0 (j/Kg C).
b) How long will it take the induction heater at a power output of P = 50,000 watts or (j/s) to heat the bar?
c) If the bar has an initial length of Lo=1.0 m at 20 C what will the length of the bar be after a heating process that increases its temperature from 20.0 C to 1100 C? The linear expansion coefficient of Iron is αI = 12.0 x 10-6 (1/C).