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1. |
A 1-kg ball dropped from a height of 2 m rebounds only 1.5 m after hitting the ground. The amount of energy converted to heat is about ? |
A. | 0.5 J. |
B. | 1.0 J. |
C. | 2.0 J. |
D. | more than 2.0 J. |
Answer» E. | |