a. Why is it difficult to hold an inflated plastic ball underwater? b. A submarine floats at

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a. Why is it difficult to hold an inflated plastic ball underwater?
b. A submarine floats at rest under the water. To rise to the surface compressed air is used to push water out of its ‘ballast’ tanks into the sea. Why does this cause the submarine to rise?

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Cambridge International AS And A Level Physics Coursebook

ISBN: 9781108859035

3rd Edition

Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside

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