ned by a falling weight (Fig. 44). Theweight being known, he meas-ured the space through whichit fell, and the difference inthe temperature of the waterat the beginning and end ofthe fall. In this way he foundthat a pound weight in falling772 feet produced enough heatto raise the temperature of… … Fig. 44. This number is called the Transformation and Indestructibility of Energy. — Theabove experiments and many others prove that when onekind of energy disappears it is not destroyed, but reap-pears in the same or some other place as another form ofenergy. In the case of sound, the energy of a…
Physics
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