same here I'm 29 now loved physics and chemistry now im just cleaning toilets and opening /closing gates worst mind numing job ever plus I'm paying way over the top to live with nothing to show for it i totally hear you brother

It was crazy trying to record with them, I had to stretch this over a couple days, at times they were so loud you can't even have a conversion and other times nothing at all

It could've triggered an earthquake and split the town in half. 😂

Sorry to hear that, I can relate to your experience, my school years were about the same, I vowed that I wouldn't fall into the same path. I made up a simple quote that was my philosophy of education, probably said it a thousand times. Science needs to be experienced.

I think you're correct but yeah same type of sound

There is a microwave tower near my sister's house in the country. I stopped there one day and using a zoom recorder, laid it on one of the guy wires and tapped the cable lightly. I like the delayed effect because of the length the vibrations had to travel and return. : )

Yeah… at 3:12, this student is not far off the reality, really… stretched metal cable, stretched metal spring…. Not so very different!

thanks, glad you got here

I was just thinking the same thing as I scrolled down the comments, shame mine went home yesterday 🙁

interesting that even with the metal cans we found some were better than others, some cans have ridge rings at the bottom making them less flexible giving poorer sound. We found that the Pringles cans had the best sound of any of the metal bottom containers that we tested.

@@YeanyScience - I remember using the larger cans with a volume of 2.5-3kg and they had a larger surface area for the 'skin'. We tried putting rivets into them, like a drum kit cymbal, to try get some sort of better noise but the jury was on whether our ideas made a difference.

@@YeanyScience Don't Pringles cans have aluminum bottoms?

I was the kid with the longer brown hair in the thumbnail, and I wish he was our science teacher, but he just came back to visit. I wished that he was the full time teacher

Or thin copper wire, we used that to great effect when we were kids

@@WynandSchoonbee when I was a kid, we used thin copper wires insulated in plastic, and attached to a special socket in the wall. 😜

It seems like for most of my life I've had station wagons. This one, a 1978 Pontiac Grand Safari wagon, I'm keeping more for the fun it rather than serious transportation. I've had it for about 12 years now and somehow has managed to sneak itself into some of my videos.

@@YeanyScience it's a handsome machine.

thanks, heard you and Erik got together this last spring, hope that we could do that sometime in the future. There's a couple other demonstrations that go along well with the one you described, I hope one of these days I get to show it to you.

thank you

1978 Pontiac Grand Safari, somehow keeps sneaking into my videos

Same here. Seatbelts not required.

we've been trying several versions, I have a 2nd video planned on telephone improvements, and thanks to Cody for getting you here

sounds like you have a pretty good demonstration there, you should consider posting a video on it. I know I would love to see it. thanks you for the comments

@@YeanyScience yup! sure i will try sir . siam so glad you asked!

*Their door

Glad you like it!

I'd like to try that, another example, in Philadelphia's fairmont park there is a statue with a curved wall surrounding part of it, standing at opposite ends of the wall you can whisper and hear very clearly at either end.

2:50 oooh

I wondered about the extinguishing of the candle, was it due to the sound wave or the pistol causing enough air movement to put it out.

Maybe a rubber diaphragm snapped at one end of your long pipe could reveal if a pulse would arrive at the other end enough so as to disturb a candle. In the Paris water pipe Biot struck the pipe with a hammer and the sound through the metal was estimated 10 to 11 times faster than the later arriving sound through the air in the pipe. This was also the case with a pistol and specially arranged bell. What was curious about the mention of voices were 1/2 second interval echoes returning to the sender, yet only a single sound at the far end was received. It was speculated to be caused by the lead collar joints in the 8 foot 3 inch lengths of pipe but I wonder. Sadly no diameter of the pipe was reported. The information was mostly from the title "Experiments on the Propagation of Sound through solid Bodies, and through the Air contained in very long Pipes" by Mr. Biot, specifically the listing ("The" Quarterly Review volume 3), searching Google books/free public domain. As many feet as a bullet would drop over 1000 yards and the collars in the pipe it seems a bullet might be stopped before reaching the end of Biot's water pipe. I wonder if a gunshot or strong pulse of air in a pipe could produce an air pulse sound ahead of a slower following pressure wave vaguely analogous to the pop sound a toy smoke ring shooter makes and the slower vortex ring that follows?

Rereading the article he refers to only possible accidental protrusions in the pipe so maybe the pipe was smooth and a bullet would travel the length. Your question about how the candle flame was put out made me curious. I can think of a bullet zinging by a flame maybe, a pistol firing a blank and causing a sudden sound wave roughly 3 seconds later, or perhaps a following or slower pressure pulse conveyed from the explosion? Alas ...

Hi Tim, I've tried string, wire, nylon rope and fishing line previously. We found the string the easiest to work with and kept them all the same (except for the big buckets). Changing the string type introduced too many variables for the short amount of time we had. I would say stick with the fishing line

that actually works better than the string I used but I opted for string. I found working with fishing line telephones and so many students was problematic, harder to see and once the line got tangled it was impossible to untangle.

@@YeanyScience UHMWPE (ultra high molecular weight polyethylene) braided fishing line works better than nylon line and is easy to see. It's high modulus and low loss make it work better than ant other string or line or wire I tested. Kevlar may work as well. The only Kevlar line I have is too thin. Also, try different cups at the two ends. That way resonances of the two cups are different, averaging to a flatter frequency response.

I should look into it, I'd be interested in any information, personal experiences you can give me, either here or my email is bgoknee@comcast.net. thank you

@@YeanyScience Sure! I emailed you the full details.

I'm working on that very question, will post the results when I can get some student helpers

Thanks David, we will be using that in a future video.

Currently trying 6 inch tubes up to about 300 feet, quite a bit shorter an Biot's test. Good question about the optimal diameter , I wondered that myself

The last video they posted a few days ago stated what causes it.

It's a great demonstration but I've never tried it, I hope to one of these days

Anchors Away!

@@Bendigo1 thx 😌

WHATS THAT DJANGO TUNE MY GUY**

which one?

I've learned about using copyrighted music the hard way so I used music that youtube makes available for use in videos. The clip where the string is on the ground was at my request, otherwise we reviewed that the strings need to be taunt, hands off of the diaphragm, hold the container straight towards the opposite side, we were short on time but all in all the kids did a nice job with the investigation

I had thought of keeping the two methods separate, I plan on at least two more videos which will look at each method singly.