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A Textbook of Chemistry
ISBN-13:
9780243836963
Veröffentl:
2017
Seiten:
0
Autor:
William A. Noyes
eBook Typ:
PDF
eBook Format:
Reflowable
Kopierschutz:
NO DRM
Sprache:
Englisch
Beschreibung:
Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. 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.
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.