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The chemist, however, uses the word to denote a class of compounds, which he defines as the products of replacing the hydrogen of an acid, wholly or in part, by a metal or a metallic radicle. Common salt is a compound which comes only to a limited extent within the terms of this definition and only to this limited extent do these two salts mean the same thing.
Sometimes, a scientist will seize a word and force it to do work for which it has no qualifications. Such is the case of a family of related words – “force”, “work”, “power” and “weight”.
In mechanics, force does not mean strength. It seems to say no more than that a force is a push or a pull, and since in physics all things must be measured it acquires, from Newton’s Law of Motion, a quantitative sense which makes it the product of mass and acceleration. This, of course, is quite different from anything that the word “force” implies in everyday use.
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ts 27 окт 2013 в 14:26
The chemist, however, uses the word to denote a class of compounds, which he defines as the products of replacing the hydrogen of an acid, wholly or in part, by a metal or a metallic radicle. Common salt is a compound which comes only to a limited extent within the terms of this definition and only to this limited extent do these two salts mean the same thing.
Sometimes, a scientist will seize a word and force it to do work for which it has no qualifications. Such is the case of a family of related words – “force”, “work”, “power” and “weight”.
In mechanics, force does not mean strength. It seems to say no more than that a force is a push or a pull, and since in physics all things must be measured it acquires, from Newton’s Law of Motion, a quantitative sense which makes it the product of mass and acceleration. This, of course, is quite different from anything that the word “force” implies in everyday use.