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Find out why you can make music by blowing into empty bottles. Created by David SantoPietro.
Watch the next lesson: https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/doppler-effect/v/introduction-to-the-doppler-effect?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Missed the previous lesson? https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/standing-waves/v/standing-waves-in-tubes-part-1?utm_source=YT&utm_medium=Desc&utm_campaign=physics
Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We’ll start by looking at motion itself. Then, we’ll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you’ll need a solid understanding of algebra and a basic understanding of trigonometry.
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We’ve also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
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What if the first one was actually zero?
standing waves are formed by superposition of reflected waves,here there are no reflections,pl clarify,thanks.
Why do you have to blow over the opening rather than into it.
won't it be better tomato the wavelength consecutive and make the formula; 4L/2n-1
btw these vids helped me a lot and improved my physics marks
13 year old from Singapore
I am so grateful for ALL of your videos – they're the ones getting me through my physics exams! Thank you so much!
NODEsplacement :)))
Thank you
this video is awesome thank you so much
Informative
Very good ! ty
you are so fkin cool
My teacher sucks , she never tried to help me, I understand the concept after this video.
awesome so good
Thanks a lot! Now I understand standing waves in open and closed tubes really well!! 😘
You're are awesome David SantoPietro!
OH MY GOD IM SOO SOOO GRATEFUL!!! I’ve finally understood this! You’re MUCH MUCH better than my school’s teacher AND my home tutor!! THANK YOU VERY MUCH!! I really appreciate these videos a lot!
Thank youuuuuuu sooooo much.. i really tried to find this in book but i couldn't understand .. your video helped me a lotttttttt ❤
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Great explanation as usual!!!!! Love khanacademy <3 <3 :-D:-D
U r just great……
R u Pakistani???
Why always antinode in open organ pipe and node in closed organ pipe????
You are a great teacher for me. Thanks a lot.
Good
When people complain about the clarinet not having an octave key so u show them this video
this is like the Harmonic series from AP calculus bc
Please a choke end of a resonator is like a closed end?
Why could he not have written the formula as λn = 4L/(2n-1) ?
That would work for all integral values and you wouldn't have to worry about any missing harmonics.
That said, this video is amazing, like all the other ones from Khan Academy.
this shit whack
when you use a glass jar with different heights of water, and strike it with a metal, you get a higher pitch as the water level is lowered unlike what is mentioned here. Why is that?
why is it necessary to have an end at the node?
Thank you!! Your video helps a lot!!
You are amazing!
Thank you so much
sooooooooooo gooooooood i am so impressed by the way you teach this abstract topic so easy! It has been really tough time for me to understand the idea of standing waves in open pipes and one closed pipes. now after watching your lesson, now i compeletely get it! i am so happy. so much thank you for you from South Korea
explanation regarding compression,rarefaction,pressure variation,and standing wave would be highly appreciated
1)What do you mean by "the length of the tube determines which wavelengths are allowed? i mean, if i put a sound source on the open end of a bottle that has a frequency other than Vn/4L what happens to the air in the bottle? Is a wave not created? the air molecules have got to move but what happens?
2) Any idea what happens during speech? the source is in the middle of a closed tube which has many parts of different lengths and volumes. as the air passes through them they can be considered seperately as open ended tubes.
I'm so confused 🙁
one thing i never understand is that " why waves reflects form the open end?" could anybody help me?
I don't really understand the "missing harmonics" idea. It seems to me that every node added is a subsequent harmonic with wavelength equal to 4L/(2n-1)
this was soo muchh helpful. so much. thanks a ton. books suck.
This is very helpful and I have told my friends about this thanks a lot