Obtaining energy from matter

posted by Bruce A. Perreault on April 15th, 2004 According to the law of conservation, when we give to a material body a determined quantity of energy, this energy might be transformed, but the body will never give back a quantity in excess of what it received. This principle is considered too self-evident to be…

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Black Light

The Problems of Physics: Book IV: Black Light Chapter I – Invisible Phosphorescence 1. The Divisions of Black Light The appearance in 1896 of the work of Roentgen on the x-rays determined me to publish immediately in order to settle the order of dates, a note on some particular radiations capable of passing through bodies,…

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The Problems of Phosphorescence

The Problems of Physics: Book III: The Problems of Phosphorescence Chapter I – Phosphorescence Produced by Light 1. The Different Forms of Phosphorescence The name of phosphorescence is given to the property which several bodies possess of becoming luminous after having been exposed to various influences, that of solar radiations especially. Phosphorescence, one of the…

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The Problems of Heat and Light

The Problems of Physics: Book II: The Problems of Heat and Light Chapter I – The Problems of Heat 1. Old and New Ideas on the Causes of Heat Hardly any scientific subject has called forth so many researches as heat. Thanks to them, thermodynamics and the energetic theory, which are derived from it, have…

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The New Conception of Forces

The New Principles: Book IV – The New Conception of Forces Chapter I – The Individualization of Forces and the Supposed Transformation of Energy 1. The Transformations of Energy No one at the present day is unaware — and the first savages who succeeded in obtaining fire by rubbing together two bits of wood might…

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