The book A Text-Book of Physics was written by author Silas Ellsworth Coleman Here you can read free online of A Text-Book of Physics book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Text-Book of Physics a good or bad book?
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The numerical relation between the calorie and the units of mechanical energy is considered in Art. 242. 209. Specific Heat. When equal masses of hot and cold water are mixed, the resulting temperature is midway between the original (initial) temperatures of the separate masses; e. G. If the temperature of the cold water is 20 and that of the hot water 100, the temperature of the mix- ture will be 60. In cooling one degree, the hot water gives out enough heat to warm the equal mass of cold wate...r one degree. MEASUREMENT OF HEAT. SPECIFIC HEAT 249 If a piece of hot metal is dropped into an equal mass of cold water, the resulting temperature is far below the average of the initial temperatures. If the metal is iron, for example, it will be found that the temperature of the iron falls about 9 degrees for each degree of rise in the tem- perature of the water. Plainly, therefore, iron gives out only ^ as much heat as an equal mass of water does during an equal fall of temperature. It follows further that only ^ as much heat is required to raise the temperature of a mass of iron a given number of degrees as is required to raise the temperature of an equal mass of water the same num- ber of degrees.
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