Consider a hypothetical material that has a grain diameter of 6.3 × 10−2 mm. After a heat treatment at 500 °C for 4 h, the grain diameter has increased to 1.10 × 10−1 mm. Compute the grain diameter when a specimen of this same original material (i.e., d0 = 6.3 × 10−2 mm) is heated for 5.5 h at 500°C. Assume the n grain diameter exponent has a value of 2.0