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| The force of gravity | ||
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José Luis San Emeterio Peña |  |
| The blue zones over the earth represent high tide zones. |
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The mass and weight of bodies | |
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The weight of bodies | |
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The difference between mass and weight | |
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Conclusions | |
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Gravity beyond the earth | |
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The force of the tides | |
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The movement of satellites | |
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The solar system | |
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Conclusions | |
