A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 136
e verticalscales, the work done is Wk; but this is expended inturning the paddle in the water, and, owing to the fric-tion of the water (Art. 87), is all transformed into heat.Hence if the amount of water is known, and its tempera-ture before and after the experiment, the number offoot-pounds of… … Fig. 44. Fig. 45. of the pulleys, the radiation of heat from the box, andseveral other points which need not be explained here.The result obtained was this: That an expenditure of1390 foot-pounds of work produce one unit of heat on theCentigrade scale (772 ft.lbs. on the Fahrenheit scale).Many…
Mechanics
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