. A text book of physics, for the use of students of science and engineering . ng varies inversely as slm. Expt. 157.—Absolute pitch of a fork. Tune a piece of the string to unisonwith the fork, and measure the length I. Note the tension t in off a piece of the string and weigh it, to determine m. Calculate thefrequency from the equation ?? i~r n=07 V 2,1. rn. m Meldes experiment.—A stretched string may be set in vibrationby means of a tuning-fork, provided that the natural frequencyof the string is equal to that of the fork. Let the string AB, which may be a piece of stout thread or
. A text book of physics, for the use of students of science and engineering . ng varies inversely as slm. Expt. 157.—Absolute pitch of a fork. Tune a piece of the string to unisonwith the fork, and measure the length I. Note the tension t in off a piece of the string and weigh it, to determine m. Calculate thefrequency from the equation ?? i~r n=07 V 2,1. rn. m Meldes experiment.—A stretched string may be set in vibrationby means of a tuning-fork, provided that the natural frequencyof the string is equal to that of the fork. Let the string AB, which may be a piece of stout thread or thincord, be attached to one prong of the fork B (Fig. 678), the otherend passing over a pulley and having a weight W attached. Thenby moving the fork nearer to or further from the pulley, a lengthof the string may be found which will resound to the fork. Alsoby doubling the length of the string, or suitably changing W, the 736 SOUND CHAP. string may be set in vibration in the mode (b) of Fig. 675. Bysuitable alterations, the string may be set into vibration in any.
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