PDA

View Full Version : Quick conceptual help!


Winner
Nov14-04, 03:34 PM
Ok, I don't understand why in a sound resonating pipe, that the in the closed end there needs to be a node and not antinode. Why?

Hurkyl
Nov14-04, 03:36 PM
IIRC, you want to look at the reflected wave.

Winner
Nov14-04, 03:43 PM
huh? Can you elaborate?

Hurkyl
Nov14-04, 03:59 PM
Sorry, my mistake, I was thinking of a transverse wave, not a longitudinal wave.


Recall that nodes are where the particles do not oscilate about their rest position... does that help?

Winner
Nov14-04, 04:04 PM
Right. I get that. But what would it make a difference if i had a anti-node instead on a closed pipe?

Hurkyl
Nov14-04, 04:18 PM
Well, it's kind of difficult for air particles to oscillate through the pipe...

Winner
Nov14-04, 04:28 PM
wait. Ok imagine the pipe, it has a plunger and an open side on the opposite end. Why would air particles have trouble? It is coming from the open side or the anti-node side.

Hurkyl
Nov14-04, 06:40 PM
When I said through, I meant through the closed end.