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Ebook A Textbook of Chemistry
- Editore:
Forgotten Books
- EAN:
9780243836963
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- Nessuna
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- 37.67 Mb
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Descrizione Ebook A Textbook of Chemistry
To illustrate: we find that if we let go of an object held in the hand it will fall. The first time this is observed it is simply a fact of experience or observation. But a further examination of the relations involved leads to the general statement that any body which is not supported will fall. We may, perhaps, call this a law, but it is still a comparatively imperfect statement of the existing relations. A further study teaches us that all bodies fall, in a vacuum, at the same rate, irrespective of their size or weight and that the velocity of a falling body varies as the time during which it has fallen. These may be called the empirical laws of gravitation, that is.
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