Honestly 360 is what it says on my answer key and I subtracted 1980 from 1620 so I found lambda by V/f=lambda... the answer key says it's the 9th and 11th harmonics with a open/closed tube...I just need an explanation of how they got that answer.
I found the speed by the equation v=lambda*f which both frequencies came out to 360
I'm not sure what the formulas are for the tubes...that's my problem. I don't know how to go about finding the harmonics. Hopefully you physics genius's can help me.
I cannot figure this out! Please help!
Q: A Spaceship lands on a new planet. The crew decides to measure the speed of sound by blowing across one end of a tube. The tube is 50cm long, and the crew finds one resonant frequency at 1620Hz and the next resonant frequency at 1980Hz. What is the...