(a) From the curves shown in Figure 10.11 and using Equation 10.18, determine the rate of recrystallization for pure copper at the several temperatures.
(b) Make a plot of ln(rate) versus the reciprocal of temperature (in K-1), and determine the activation energy for this recrystallization process. (See Section 5.5.)
(c) By extrapolation, estimate the length of time required for 50% recrystallization at room temperature, 20°C (293 K).