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1. |
_ When the weight of a ball inside the ball mill is just balanced by the centrifugal force,$? |
A. | The ball abandons its circular path for a parabolic path |
B. | The ball abandans its parabolic path for a circular path |
C. | The ball continues to move on a circular path |
D. | The ball continues to move on a parabolic path |
Answer» B. The ball abandans its parabolic path for a circular path | |