Help with lab - "Speed of Sound in Air" 1. The problem statement, all variables and given/known data https://www.learningpoint.org/cours...pk1=7284,user_id_sos_id_pk2=1,one_time_token= Problem #1 2. Relevant equations N/a (I think) 3. The attempt at a solution No idea. I know that a node is a point of destructive interference, but I don't get the problem at all.