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| 1. |
What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air. |
| A. | πg/3 |
| B. | .01πgH/4 |
| C. | .01πgH/8 |
| D. | .04πgH/3 |
| Answer» B. .01πgH/4 | |