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| 1. |
What is the height at which acceleration due to gravity becomes 1/9th the acceleration due to gravity on the surface of the earth in terms of R, radius of the earth? |
| A. | 3R |
| B. | 3R/2 |
| C. | 2R |
| D. | 2R/3 |
| Answer» D. 2R/3 | |