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 Example 11.2

 Part A:
 The stress required to move the dislocation at temperature 0K is 1000 MNm^-2

 Part B:
 The stress required to move the dislocation at temperature 100K is 655 MNm^-2

 Part C:
 Stress to be applied is zero
 The stress required to move the dislocation at temperature 300K entirely overcome by thermal fluctuations

 Part D:
 Stress to be applied is zero
 The stress required to move the dislocation at temperature 500K entirely overcome by thermal fluctuations