jinsan

i would think that centre of mass is just in the ball as wen an object has centripetal force acting on it it also has centriFUGAL force to balance it out. But I could be wrong

yeah i got it now, thanks for all the help. The closed pipe has a node at the end which means it can only have odd harmonics (odd number of 1/4 \lambda) while the open ended pipe can have odd and even..

So, do you understand the difference in the boundary conditions? The wave must be a node where the pipe is closed — no air can move there.

yeah I know the node and the antinode. Boundary conditions? explanation could help thanks

Well, the question directly from the book: "What aspect of the standing wave in a closed pipe makes it impossible for it to have the same

wavelength as the standing wave in an open pipe of the same length?"

you probably want something gas powered they get so much more power get a engine from a rc car (the ones that go like 70kmh) and hook it up with the propellors

Yep Sorry I must have not explained everything properly

The picture below tells us what it should look like with open ended on the left and closed on the right.

I'm still @ high school so just speaking in general thanks

Hi, I'm stuck on a question that asks why is the wavelength in a closed pipe longer than the wavelegth in a open-end pipe. I know by diagram the wavelength of a closed pipe is 4 times as long as the pipe (natural harmonic) and the wavelegth of an open ended pipe is twice as long.

does someone have a good explanation (in words) why this is? Thanks

Oh and I'm new, is there a list of symbols I can put into posts? like lambda and the f for frequency.. I looked thru the latex ref but cant seem to find any. Thanks for all the help