Here's the situation: you have a pipe in a bucket of water and can vary the length of the air column in the pipe by raising or lowering it. Here's my question, hope someone can help. The speed of sound in helium is three times greater than the speed of sound in air (340m/s). Under these conditions will there be any resonances as you change the pipe length. If so what lengths of the pipe will give you resonances (first three resonant lengths). Where do I get started? thanks!!