When a tuning fork is held over the open end of a very thin tube, as in

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When a tuning fork is held over the open end of a very thin tube, as in Fig. 12.7, the smallest value of L that produces resonance is found to be 30.0 cm. 

(a) What is the wavelength of the sound? 

(b) What is the next larger value of L that will produce resonance with the same tuning fork? 

(c) If the frequency of the tuning fork is 282 Hz, what is the speed of sound in the tube?

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