Episode 17: Resonance - The Mechanical Universe
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- Опубліковано 18 гру 2016
- Episode 17. Resonance: Why a swaying bridge collapses with a high wind, and why a wine glass shatters with a higher octave.
“The Mechanical Universe,” is a critically-acclaimed series of 52 thirty-minute videos covering the basic topics of an introductory university physics course.
Each program in the series opens and closes with Caltech Professor David Goodstein providing philosophical, historical and often humorous insight into the subject at hand while lecturing to his freshman physics class. The series contains hundreds of computer animation segments, created by Dr. James F. Blinn, as the primary tool of instruction. Dynamic location footage and historical re-creations are also used to stress the fact that science is a human endeavor.
The series was originally produced as a broadcast telecourse in 1985 by Caltech and Intelecom, Inc. with program funding from the Annenberg/CPB Project.
The online version of the series is sponsored by the Information Science and Technology initiative at Caltech. ist.caltech.edu
©1985 California Institute of Technology, The Corporation for Community College Television, and The Annenberg/CPB Project - Наука та технологія
The Prof is the ultimate in Nerd humor.
That's why we love him! :)
I loved watching this series back in 1985/86 on WYCC Channel 20 near Chicago.
I love watching it in 2023. 🤓
Still my favourite physics joke - the best gag about breaking a wineglass by resonance ever !
7:09 How a vibrating tuning fork works by means of resonance, sending sound waves through the air and being disturbed by sound waves from the piano
8:05 Revision of the differential equation for simple harmonic motion that was introduced in the previous episode; that equation is then used along with F = m.a to determine the spring-mass system’s natural frequency, ω0.
10:30 Determining the effect of applying a force at a frequency ω to the system.
12:21 Graphic explanation of the resonance phenomenon as ω approaches ω0.
24:04 Prof. Goodstein uses resonance to break a laboratory glass beaker.
The speaker is a master at delivering humor! He was awesome in this presentation. The entire video was fascinating!
How interesting is a class like this! So practical, inexpected and real! I hope that physics classes are still like this at Caltech!
Thank you very much Caltech for such a detailed explanation of resonance with practical and mathematical examples. I did never see such practical examples of resonance.
"Glass is a viscous fluid" -1 point for wrongness. Of course, +1000 points for putting this series online.
One of those lies that got told so many times that people take ir for granted, even physicists apparently. There are others though.
Interesting article in Scientific American about this topic: www.scientificamerican.com/article/fact-fiction-glass-liquid/
"A mathematical model shows it would take longer than the universe has existed for room temperature cathedral glass to rearrange itself to appear melted."
"...[W]orkers [in old Europe] installing the windows preferred, for one reason or another, to put the thicker sides of the pane at the bottom."
Ressonância é um dos fenômenos físicos mais interessantes da física , finalmente eu consegui ver a equação que descreve esse fenômeno ( A = a0 / w0^2 - w^2 ) , pois nunca vi essa equação nos livros de física do ensino médio . É interessante pensar que não é preciso aplicar uma força muito grande para quebrar um objeto ( seja ele um cálice ou qualquer outro objeto ) , basta que apliquemos essa força na freqüência desse objeto mesmo que essa força seja pequena . Há outra coisa , esse professor é muito comédia kkkkk .
Absolutely well done and definitely keep it up!!! 👍👍👍👍👍
I have the books, I loved the classes! Thanks putting this up, Caltech! I'd love to be able to make the Brazilian Portuguese subtitles for it if you enable the option - so teachers here can use the videos to teach.
What books are you talking about? Can you please share the info of such books?
@@vittoriocapra1169 I was wondering the same thing.
...did that dude on the bridge make it!??
Yes, he did... However there was a dog inside the car who did not make it. (I heard about it before back in high school, but I verified it at the following link: www.todayifoundout.com/index.php/2012/10/the-only-victim-of-the-tacoma-narrows-bridge-collapse-was-a-three-legged-dog/)
Minor point: the Tacoma Narrows Bridge does not connect Tacoma to Seattle.
The Tacoma Narrows Bridge is a pair of twin suspension bridges that span the Tacoma Narrows strait of Puget Sound in Pierce County, Washington. The bridges connect the city of Tacoma with the Kitsap Peninsula and carry State Route 16 (known as Primary State Highway 14 until 1964) over the strait.
Whoa! "Galloping Gertie"
Those telephone wires "singing" could explain part of the phenomena where people hear strange sounds that apparently are coming from the sky? Like a "hum" sound or something?
A question I had at the end: Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
How the musical instrument resonates to all strings while it should have single resonant frequency ?
a real object isn't a simple mass with a spring attached to it but is made up of numerous differential masses and the internal stiffness of the material combining them. in theory a continuous object has an infinite number of natural frequencies (only the first few matter because higher frequencies lead to lower amplitudes). with that knowledge you can build an object that resonates to certain frequencies
I'm going to repair my Honda constant velocity transmission without equations, Wish me luck 🙏
And Vortex Shedding explained the e-Pi-i sync-duration resonant probability Universe, centered on Absolute Zero Kelvin, orthogonal-normal, axial-tangential, amplitude-frequency alignment, which is the inside-outside quantization oscillation cause-effect holography, a flash-fractal instantaneous sum-of-all-histories and WYSIWYG QM-TIME resonance Completeness, here-now-forever. Required experience by everyone to look, listen, hear and see their own i-reflection in the Universal Mirror Test.
What piece is the orchestra playing?
Ludwig van Beethoven - Symphony No. 9, II movement
Thanks!
the year in 1996 oliver & company returns to theaters the hunchback of notre dame twister space jam scream for best picture
Quem diria que o vidro é um fluído , só que muito viscoso .
Epilepsy seems to be some form of resonance in the brain?
Wave addition. (10:50)
i would have been a good little boi if i was allowed to have him as a teacher!
McIntosh C22 and MC60
Glass is not a fluid. Much older Egyptian glass vessels do not have the "flow" look of cathedral panes.
Scientifically, the term "glass" is often defined in a broader sense, encompassing every solid that possesses a non-crystalline (that is, amorphous) structure at the atomic scale and that exhibits a glass transition when heated towards the liquid state. " from the wiki
Glass was mostly installed with the thickest part on the bottom.
YEET.
This is so annoying. Whoever put the Annenberg Media logo at the front of these videos really made a mistake. It throws the whole audio off the video. I have watched these lectures more than once, so I know there was not always this Annenberg Media introduction. Can someone please put it back to what it was?
No
In Jesus' Name, Amen. God bless you ✨✝️
who here for Mr.gibbs clas