Phrase by 'Hermann von Helmholtz'
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A raised weight can produce work, but in doing so it must necessarily sink from its height, and, when it has fallen as deep as it can fall, its gravity remains as before, but it can no longer do work.
Author: Hermann von Helmholtz - German PhysicistWork , Doing , Fall , Deep
But heat can also be produced by the friction of liquids, in which there could be no question of changes in structure, or of the liberation of latent heat.
Author: Hermann von Helmholtz - German PhysicistStructure , Heat , Changes , Question
Heat can also be produced by the impact of imperfectly elastic bodies as well as by friction. This is the case, for instance, when we produce fire by striking flint against steel, or when an iron bar is worked for some time by powerful blows of the hammer.
Author: Hermann von Helmholtz - German PhysicistTime , Powerful , Fire , Impact
Now, the external work of man is of the most varied kind as regards the force or ease, the form and rapidity, of the motions used on it, and the kind of work produced.
Author: Hermann von Helmholtz - German PhysicistWork , Man , Now , Force
Reason we call that faculty innate in us of discovering laws and applying them with thought.
Author: Hermann von Helmholtz - German PhysicistThought , Us , Laws , Reason
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