1. The longest pipe (one side closed) on an organ is 6.18 m.
(Assume the speed of sound is 343 m/s.) (a) What is the lowest
frequency of this pipe (in Hz)?Answer= 13.7 Hz.

(b) How long is an open-open pipe having the
same fundamental frequency (in m)?

2. Five saxophones are producing sounds each of
intensity level 70.5 dB. What is the intensity level of the
resulting sound? (dB)