(a)[1]
Calculate the wavelength of the sound wave from the loudspeaker.
(b)[1]
State a representative value for the speed of sound in air.
(c(i))[2]
Calculate the frequency of the sound from the loudspeaker.
(c(ii))[1]
Explain whether the sound from the loudspeaker would be audible to a human with normal hearing.
(d)[4]
Explain whether sound from the loudspeaker can be detected at either point J or at point K.