The grain size of pure copper after annealing for 10³S is 10 μm. If the time exponent is 0.5, the total time of annealing required to obtain a grain size of 40 μm is . . . . . . . . S.

A. decreases B. increases C. remains constant D. shows no systematic variation

A. Burger vector and the dislocation line are Parallel to each other for screw dislocations B. Burger vector and the dislocation line are perpendicular to each other for edge dislocations C. Screw dislocations glide parallel to its Burger vector D. Edge dislocations glide parallel to its Burger Vector

A. 210 B. 220 C. 222 D. 310

A. 18110 B. 18300 C. 19360 D. 19890