The average grain diameter for a brass material was measured as a function of time at 650°C, which is tabulated below at two different times:                                   Time (min)                           Grain Diameter (mm)                                        20                                 4.4* 10-2                                       88                                 7.1* 10-2             (a)  What was the original grain diameter?             (b)  What grain diameter would you predict after 162 min at 650°C?

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The average grain diameter for a brass material was measured as a function of time at 650°C, which is tabulated below at two different times:

                                  Time (min)                           Grain Diameter (mm)
                                       20                                 4.4* 10-2
                                      88                                 7.1* 10-2

            (a)  What was the original grain diameter?

            (b)  What grain diameter would you predict after 162 min at 650°C?

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