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2.68 A triangular wooden block is resting on the bottom of a tank, as shown in Fig- ure P2.68. Water is slowly added to

2.68 A triangular wooden block is resting on the bottom of a tank, as shown in Fig- ure P2.68. Water is slowly added to the tank, and when the depth of the water is h = = a/2, the block is on the point of lifting off the bottom. Find the specific gravity of the wood. FA h wood a

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