Throughout my college years and until now, I didn't know what the sinusoidal waves represented (varying air particle oscillations). I just learned the equations and things taught to me. Thanks to your video I finally understand through your visual animations. Thank you so much!
@wazulpoosh718710 жыл бұрын
you have no idea how much it helped me.......i finally understood in like 15 minutes what otherwise would have took me more than an hour to understand.....thankx :)
@youngwolf68965 жыл бұрын
Man I love this video and the guy explaining it. I love the colloquialisms he uses to describe the particles - makes it so much easier to understand.
@zayeedhumayun25028 жыл бұрын
Finally, after watching this video I fully understood stationary waves open pipe. one of the videos that described this complicated topic easily
@rahulm7453 Жыл бұрын
Beautifully explained with clear language and colors. Thank you
@tysonchicken9232 Жыл бұрын
This video was so helpful. I’m taking an online Physics class and our textbook didn’t explain any of the vocabulary like node, antinode, and fundamental
@shahnazhassan18853 жыл бұрын
Finally someone who does not bore you! Thankyou!!
@lukequinlan67327 жыл бұрын
Khan Academy you are a God, literally my year 12 physics teacher who did an advanced physics degree cannot even explain this nearly as well....
@beboshi699 жыл бұрын
Thank you so much I wish I watched this before that suprise test I had today
@arshiaslmn99864 жыл бұрын
Thank you for great simple demonstration!
@pookieboo95465 жыл бұрын
THANKYOU VERY MUCH !!! I'm from Thailand, and I never understand about the waves until I found this clip. thank you
@ahmadsyamimarsyad64314 жыл бұрын
I like the oscillating like crzy part 🤣
@men3ammohamadsemary2872 жыл бұрын
This guy explaining it is great
@JohnLopez-jm3yy6 жыл бұрын
Good man, use the word "opened' when the other word in the same sentence is "closed". I like how a transparent tube reflects light (like in a fiber optic wire).
@mysterioushoodedguy23324 жыл бұрын
Holy crap dude thank you so much this makes things so much easier to understand, I don’t get why my school didn’t teach this in class
@zahrashahabinezhad4 жыл бұрын
In open tubes, the second and the third harmonics wouldn't look like the ones you drew. Open tubes have antinodes at the two ends, vs strings which have nodes at the two boundaries. Great video!
@joerectifier3 жыл бұрын
Fantastic video.....
@arabindakumarpal30636 жыл бұрын
how can one give such an awesome explanation!!!......
@cine_cuts035 жыл бұрын
Your classes are nice and understandable Plz add some more animation thus everyone could understand the concept easily So please add more animation Thank you 😊😊😊😘❤️❤️
@Lee14G8 жыл бұрын
Why is Leonardo Dicaprio giving lectures?
@dannyboy123577 жыл бұрын
I thought it was owen Wilson.
@anch955 жыл бұрын
Yes ,Owen Wilson
@BarryPennock6 жыл бұрын
Very illustrative!
@njoodalbraik81866 жыл бұрын
you're better than my prof. thank you a lot!
@swarlychar5 жыл бұрын
I LOVE THAT YOU SKIP WRITING TIME TO SHORTEN THE VIDEO
@nameless46306 жыл бұрын
You’re the only person who allowed to understand the concept of a wave in a tube i was SO confused before this but now its all a clear image to me i fucking love the fuck out of u
@sakshyamkataria5993 жыл бұрын
Loved yr explaination 🔥❤️
@ThomasHaberkorn4 жыл бұрын
Dear Prof., I have a mix up in my terminology, I think you can clear things up. I did the following experiment: I have air flowing through a straight pipe. Pressure ratio between outlet and inlet is lower than the critical pressure ratio, which suggests flow velocity at the outlet is close to the speed of sound. I have recorded the sound of this process and analyzed the frequency spectrum. Suprisingly for me (but maybe not for you), the dominant frequencies are in a integer ratio to one another. So this would imply a standing wave behaviour.. but can it be called that? The air is moving at a great speed through the pipe after all. I search on the web for explanation, of little avail. Literature containing a mathematical approach would be greaty appreciated. Take care, love your videos.
@kabouch3 жыл бұрын
2:51 a wave(sound) source is supposed to be placed at one end only; consequently, particles at the other end should follow the same oscillation pattern of their counterparts in front of the source; all particles oscillate rightward and then they all get leftward together. If particles in the middle do not oscillate, how energy is then transferred to the particles at the end opening!!!!!!!!!!!!
@sabrinas.13023 жыл бұрын
My question exactly! That part doesn't make sense...
@prabirkumarghosh55503 жыл бұрын
Thank you sir
@TheMidno9 жыл бұрын
you sir are awesome !!
@rb31988 жыл бұрын
Very good video. The only question i have is why does air oscillate when both the ends are open, if it can just pass through straight?
@Dan-gc3ke8 жыл бұрын
+Ronit Bhatia Yea I am confused on that as well... If it is open wouldn't the waves just leave the container?
@educationalvideos41518 жыл бұрын
I think atmospheric pressure is keeping air molecules compressed together. The pressure wave leaves the container (bands of high and low air pressure move outward) but the air molecules themselves are oscillating back and forth in roughly the same place.
@yusufabbasi94476 жыл бұрын
Man if velocity increases pressure at that region decreases and we know that high to low pressure thing...
@earthschool4635 жыл бұрын
Which software used for making the drawings and animation? Thanks a lot for such great videos.
@AbiMaslow52075 жыл бұрын
thanks for getting me thru college physics
@shin00986 жыл бұрын
Thankyou so much. Our teacher did not explain it to us.But from this video i can finally understand.
@DarkMaMonTV8 жыл бұрын
How does the standing sound wave in the both-opened ends tube happen? Why the sound wave not just pass through the tube like it normally pass through to air
@cameronmills57638 жыл бұрын
DarkMaMon that's exactly what i was thinking!!!!
@satanikk51827 жыл бұрын
DarkMaMon bro what the wave equation, look it up I'll get it
@nimy76547 жыл бұрын
DarkMaMon , there is an interface at the open ends. The density of air inside and outside the tube is slightly different. Therefore the wave reflects at the interface and superpose with the original wave producing a standing wave.
@juliakim82267 жыл бұрын
I do believe that (sound) waves are a transfer of energy, not matter. As such, a given particle will only vibrate slightly from its rest position, until it collides with an adjacent particle, transferring its kinetic energy. (This is my guess only).
@damartimantilla7 жыл бұрын
Wave propagation depends on the medium through which the waves travel. When a wave encounters a change in the medium, such as going from the inside of the tube to the outside, the wave reflects. In a more fancy way of speaking, the "boundary conditions" change at the ends of the tube. This produces a reflection at the ends of the tube, both for open or closed ends. This is the same principle used for a sonogram. When the ultrasound encounters a change in the tissue, say from muscle to fat, part of the sound wave gets reflected at the boundary and the machine determines, from the time delay of this echo, the distance to the tissue boundary. This information is used to make a map or picture of the inside of the body.
@sunandakumara225311 ай бұрын
thanks
@macyoutubular3 жыл бұрын
I'm assuming you've spent some time with practical applications of Standing Wave concepts? If so, can you say that the application of the standing wave physics (math) allows a designer to produce a wind instrument that is more efficient, more powerful, or ........(?) Thanks
@helloimnisha8 жыл бұрын
Great video... Great explanation... Thank you...
@ALNOUR201110 жыл бұрын
you are the best . keep going
@roopalagarwal4399 жыл бұрын
Thnkx u saved me!..........
@reezis16196 жыл бұрын
Amazing explanation as always
@PennDraken4 жыл бұрын
Top 10 Khan Academy Intros
@Rene_Christensen3 жыл бұрын
You are assuming zero pressure conditions for the open end, which is okay-ish, but really only if there is vacuum outside the tube. In reality the boundary conditions involves Bessel and Hankel functions to take into account the end corrections.
@joseargain2108 Жыл бұрын
Great
@avacyy10 жыл бұрын
very good video
@Brian-mf3ry7 жыл бұрын
I still dont understand how blowing over the double open end pipe creates a sound wave? how does the air oscillate and why does the middle air elements not oscillate?
@muhammadyou56426 жыл бұрын
This is due to production of standing waves.
@xnovanoid576 жыл бұрын
Blowing the air particles will displace them on the horizontal axis, now (on a double open ended tube) if you imagine that each adjacent air particle to the particle that is moving follows the directions of that particle, then collectively they move in the same direction. However if you air particles on the other side of the open ended tube move in the opposite direction with the same "force" (amplitude) then the particles in the middle all pulled both directions by the same amount and thus stay still. This is also true for the vice versa (if the particles on either end of the tube were moved in the opposite directions and hence why the standing wave is represented by two different waves with opposite displacements.
@jackreid59704 жыл бұрын
@@xnovanoid57 Thanks, but, Since you only blow in to one end, what's causing the particles on the other end of the tube to move in the opposite direction?
@sunildeshpande66002 жыл бұрын
What makes a wave get reflected at the open end? I have heard that the density and pressure of the air inside and outside is same .
@bumbumtumtum2302 жыл бұрын
Nice
@Salvatores-rl7ls4 жыл бұрын
Super sir
@Vastasoceans75328 жыл бұрын
THanks!
@image52828 жыл бұрын
goood so good
@pralhadshenoy59017 жыл бұрын
Draw equal amplitudes along positive and negative axes. It will then be easier to see that one fourth.
@zeenoh5811 Жыл бұрын
wouldnt these resonant frequencies form with one node at the closed end and an antinode at the open end?
@yuseffnehru8612 Жыл бұрын
Hi, is it true that the quartz crystal used to amplify the vortex, has a hexagonal shaped, arranged in a sphere. I believe the hexagonal shaped has something to do with the sound wave geometry.
@macyoutubular3 жыл бұрын
in the last 10 seconds you say that if you put in 2 the equation represents your 2nd harmonic. Are you certain it is 2nd harmonic or is it actually 1st harmonic?
@phenomenalphysics35484 жыл бұрын
He's so funny 😂💞
@crazybakri30476 жыл бұрын
ILYSM THIS IS THE BESTEST
@utkarshshankar39038 жыл бұрын
amazing.
@gabor62593 жыл бұрын
But why do the particles in the middle not move? Why doesn't the group of particles oscillate back and forth as a whole? Or why don't they just rush through the tube?
@miroslaw56156 ай бұрын
Why the wave is standing in both open end pipe?
@harrisabdullah57695 жыл бұрын
which graphical software is used here
@tranceporter61763 жыл бұрын
Is the fundamental counted as the first harmonic ? ... or is the next harmonic counted as the first harmonic ? like: Fundamental ... first harmonic ... second harmonic ... third harmonic or Fundamental (first harmonic) ... second harmonic ... third harmonic
@TheFr3styler3 жыл бұрын
So why is this the same formular as for a string with 2 fixed ends?
@davejones47409 жыл бұрын
When is a tube not a tube. What defines a tube length? How long can a tube be, before it's not a tube. The tests you are doing are limited to a tubes length.Also If a tube is too long where sound or air pressure have resistances over distance, no sound would be heard or air pressure felt.
@jannatzeeshan97696 жыл бұрын
Fundamental frequency and fundamental wavelength are not same. 10:12
@xxxxxxxxxxxxxxxxxx11277 жыл бұрын
what happens if both ends are closed. so nodes at both ends. example: a rope
@muazzamshaikh20493 жыл бұрын
I don't grasp the fact that why the air molecules in between won't oscillate... As there is a wave travelling in parallel direction to the direction of oscillation and there's space for it to move...?
@mjylove28 жыл бұрын
soooooooooooooooo goooooooooooooooooooooooooooood
@Chelsea-gs7qj7 жыл бұрын
Are the terms fundamental wavelength and fundamental frequency the same? Could you explain why or why not? #MCATprep
@dannyboy123577 жыл бұрын
If you have one you can derive the other.
@sachinrath2194 жыл бұрын
why do we blow horizontally in the bottle top,how the air reaches inside the bottle,will standing waves be formed f blown into the bottle,thanks.
@vishaljain49157 жыл бұрын
at 11:00 there are 3 anti nodes right?
@purnashrestha31993 жыл бұрын
❤️
@pulkitmidha57108 жыл бұрын
Whats that crazy pink line at 5:56?
@lonewolf6042 жыл бұрын
I was slightly thrown off at first, the drawing of the graph going up and down and the air particles going side to side.
@sanketmehta16662 жыл бұрын
Where can i get the ppt of the same????
@roseb21055 жыл бұрын
why doe the air not move out from one end of tube to other?
@arjavgarg58016 жыл бұрын
Dude what about the superposition?
@kotakduabelas62365 жыл бұрын
if i have different distance for each nodes, can i calculate wave length use L=n/2*lambda?
@shockwave24774 жыл бұрын
10:50 Won't there be an antinode in the center?
@marcospimentel60983 жыл бұрын
the bottle is a bad example because it is very different from the tube. The bottle is a Helmholtz resonator and will behave like a mass-spring system rather than standing waves in a tube.
@harlbertmayerh75234 жыл бұрын
Like crazy!!!!! LOL
@sabrinas.13023 жыл бұрын
Your ability to explain things in an easy way is off the mark. This time though, I couldn't understand something. If the air particles at the middle part of the tube doesn't move, how is the energy transferred to the other end? Also, what makes the energy transferred and the particles oscillate in that specific way? Is there something that's missing here?