A student standing at one end of a long, empty corridor claps her hands once and hears the echo after 0.60s. The air temperature is 25∘C, for which the speed of sound is 346m/s.
(i) Calculate the distance between the student and the reflecting wall.
(ii) To make each clap coincide exactly with the echo of the previous clap, she begins clapping at a regular rate. Determine the frequency at which she must clap.
(iii) Using the frequency obtained in part (ii), calculate the wavelength of the sound in air at 25∘C.