School Physics: a New Text-Book for High Schools And Academies
School Physics: a New Text-Book for High Schools And Academies
Elroy Mckendree Avery
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When the bell sounds its fundamental tone, it vibrates in four segments, and the surface of the water tells the story by a record like that shown in Fig. 210. A few vigor- ous strokes of the bow would set up vibrations of amplitude suf- ficient to break the bell. Fio. 210. 215. Vibrations of Bells. — Just as a tuning-fork may be looked upon as a rod bent into a U -shape, so a bell may be considered as a disk bent into a cup shape. Like a disk, it sounds its fundamental tone when vibrating in fo...ur segments, and the number of segments is always even. 266 SCHOOL PHYSICS. CLASSROOM BXBRCI8B8. 1. A musical string vibrates 200 times a second. State what takes place when the string is lengthened or shortened with no change of tension, and what change takes place when the tension is made more or less, the length remaining the same. 2. A certain string vibrates 100 times a second, (a) Find the vibration-number of a similar string, twice as long, stretched by the same weight. (6) Of one that is half as long.
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