Question

9. A cube of wood of volume 0.2 m and density 600 kg mis placed in a liquid of density -3 800 kg m (a) What fraction of the volume of the wood be immersed in the liquid? [Ans. 0.75 (b) What force must be applied to the cube so that the top surface of the cube is on the same level as the liquid surface? [Ans. 400N]
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Answer 1

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No, as you said earlier, "responsibility" is singualr, so the person holding that position has only one responsibility or whatever he does is considered as one concept, responsibility, but "responsibilities" is plural and the person has more than one responsibility.

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Answer 2

Explanation:

A cube of wood of volume 0.2 m and density 600 kg mis placed in a liquid of density -3 800 kg m (a) What fraction of the volume of the wood be immersed in the liquid? [Ans. 0.75 (b) What force must be applied to the cube so that the top surface of the cube is on the same level as the liquid surface? [Ans. 400N]