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? [Assume that the displacement antinode is at the open end of the tube.]
(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?