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TheHue's SciTech
Приєднався 24 лис 2009
Electronics, physics and maths.
Gyroscopic precession -- An intuitive explanation
Explaining the spinning bicycle wheel demonstration without angular momentum vectors.
Physics Girl -- ua-cam.com/video/1Tx7FgZuV3U/v-deo.html
Veritasium -- ua-cam.com/video/ty9QSiVC2g0/v-deo.html
Physics Girl -- ua-cam.com/video/1Tx7FgZuV3U/v-deo.html
Veritasium -- ua-cam.com/video/ty9QSiVC2g0/v-deo.html
Переглядів: 545 977
Відео
An unusual way to solder electronics
Переглядів 5018 років тому
Soldering an SMD transistor to a CNC milled piece of brass, which will act as heatsink and enclosure for this device (a miniature dummy load for USB chargers). Reflow begins at 0:55. Apologies for the poor focus, my normal camera is in the wrong country!
Oscilloscope triggering holdoff trap
Переглядів 3,8 тис.9 років тому
I explain why oscilloscope behaviour that might look like a bug with dual slope triggering is actually just correct, expected behaviour of trigger holdoff. I also demonstrate similar problems to watch out for, relevant to you even if you never use dual-slope triggering and never touch the trigger holdoff setting.. Watch the EEVBlog episode: ua-cam.com/video/kcOdzFaIYNE/v-deo.html A video showin...
Fascinating phone display failure mode
Переглядів 47910 років тому
This phone was dropped on the floor, and the way that it's partially failed is bizarre. www.eevblog.com/forum/projects/fascinating-phone-display-failure-mode/
Rigol DP832 voltage measurement flaw fix
Переглядів 7 тис.10 років тому
My previous video on the DP832 flaw: ua-cam.com/video/QPBXiH2AyNE/v-deo.html Rigol's response: beyondmeasure.rigoltech.com/acton/attachment/1579/f-034c/1/-/-/-/-/DP832 Proper Connections.pdf
Benford's law explained: a response to Numberphile
Переглядів 40 тис.10 років тому
One of my more pedantic videos... hopefully it comes across as constructively critical rather than whiny! The original Numberphile video, which I slightly object to: ua-cam.com/video/XXjlR2OK1kM/v-deo.html The better video by James Grimes: ua-cam.com/video/vIsDjbhbADY/v-deo.html US Election Note TL;DR: Watch ua-cam.com/video/etx0k1nLn78/v-deo.html
Why don't planets twinkle? A simulation of a twinkling star.
Переглядів 20 тис.10 років тому
Why do stars twinkle? See ua-cam.com/video/9qimAPV3Zc8/v-deo.html for a real physical demonstration of twinkling. A quick video I did because most explanations talk about variations in temperature and refractive index, but perhaps don't help visualise what's going on. Bonus fact for mathematicians: as a direct corollary of the hairy ball theorem, no *smooth* arrangement of temperatures or refra...
Rigol DP832 voltage measurement flaw demonstrated/explained
Переглядів 6 тис.10 років тому
Rigol DP832 voltage measurement flaw demonstrated/explained
Rigol DP832 negative rail resistors mystery
Переглядів 4,3 тис.10 років тому
UPDATE: Mystery solved: ua-cam.com/video/QPBXiH2AyNE/v-deo.html Inspired by Dave Jones' EEVblog teardown video of the Rigol DP832: ua-cam.com/video/s4rV20ulsm0/v-deo.html This video is not for you if you want a general overview/review of the DP832. The summary: I noticed in the EEVblog video that current sense resistors appeared to be on the negative rail. So I did some tests and: A. There's a ...
Whangaumu bay timelapse
Переглядів 27111 років тому
Nikon D800, DX crop, ISO 3200 with Tokina 11-16mm @ 11mm, f/3.5, 30sec, 45 second frame interval.
Birds eating hash browns
Переглядів 55812 років тому
A time-lapse submitted in support of my thesis on bird-feeding behaviour. A set of hash browns were placed outside; and the consequential flock of birds recorded. My work has uncovered a multitude of ground-breaking findings: - Ice melts when left outside - Birds require food to survive - Small birds are scared of big birds The species of birds involved are beyond the scope of this research. [ ...
Ice cube melting -- experimental time-lapse
Переглядів 36412 років тому
[ Nikon D90 Nikon 18-200mm Home-made timelapse hack. 95mm, 0.8s, f/8, ISO 200. ]
This was incredibly helpful man, thanks man. I watched many other videos and they never explain it intuitively, it’s always vectors and never explained. This video was great!
I've watched some lecture snippets before from professors who absolutely sucked at explaining this. I've come up with my own somewhat intuitive explanation looking at one single point too. I just wasnt sure how solid my own explanation was. Thanks for the wonderful visuals.
this explanation doesnt make any sense.
Anti FE, Basis Of Assumption Null Hence, Objective Analysis Exclude Actual Dynamics
Huh
Nope, still makes no sense lol
Wow Physics Girl's voice has gotten deeper Edit: wron channel
thank you for this video. it made me understand the concept and helped me figure out further answers to some things i had difficulty grasping
This video was good and put some of it together for me but I was still not fully grasping it. I watched the video by Physics Videos by Eugene Kutoryansky and it all made sense. Think about a Beyblade or Dreidel, or some other spin top toy, the fast you spin the thing, the more it wants to stay upright, and the less it is affected by gravity, simple enough right? Now apply the same concept to the spinning bike wheel demo. If spun fast enough, the angular momentum will overpower the torquing force of gravity, until it slows down to the point the gravity overpowers the angular momentum. Hope that helps anyone who might still be confused.
The bike wheel is real, the globe Earth in space is fake propaganda ...
1:30 Why does the satellite hit on the front side not travel up until it reaches the backside where its gets pushed down again? Edit: Ah okay I think the gravitational force holds the satellite in a orbit
that was incredible!
Multiple thumbs up! Thanks a lot for this valuable intuitive explanation. I will certainly quote this video. Is the idea yours originally?
It was quite some time ago, I don't really remember 🙂 -- but there's certainly absolutely no chance I was the first person to think about the problem this way.
I wish I saw this vid in my high-school. It is so helpful
Look at the layout of control inputs to a main rotor of a helicopter - the swashplate is designed to the offset of control inputs to give the desired directional effect anticipated. Typically, a ninety degree offset to a free rotor assembly but a slightly different angular arrangement for a rigid rotor design.
WOW! ... so happy to find another thinker who chose an intuitive approach to this. I adopted the same 'intuitive' approach to understanding gyroscopic precession 50+ years during my high school physics class. The topic was only skimmed over, but I remember the equations intimidated me. My scenario considered the rim to be comprised of an infinite number of masses forming the disc of the rim but still conceptually independent. When I realized the masses were simply being forced to change their tangential direction by tilting the rim's axis, I was finally able to sleep at night, again. The force (arrows) pushing the balls 'off-course' require an opposite reactive force ... which ends up being the precession.
This is the very best Gyroscopic precession explanation I've seen. Well done. Thank you!
I wish I could save this video and have a reminder pop up in 8 years when my kids are in geometry
I just came back to this to help somebody online trying to understand gyroscopes (because this is the best video out there for that!)… but then I saw Dianna at the end and now I’m sad :(
Same thing on a motorcycle . You just lean to steer instead of steering.
Here's a nice video of an experiment by an astronaut on the International Space Station. Should help to visualize the concepts explained in this video. ua-cam.com/video/xQb-N486mA4/v-deo.htmlsi=BnfbZvQQ8OdfZXM4
Brilliant. Exactly the explanation I was looking for. I understand the vector explanation but finally a clear intuitive explanation of precession, which also requires some deep thinking to generalize.
The best explaination I got so far. Thank you very much sir!
Wow this is a good explanation. And to add to it, if you’re unsure why pushing up on the satellite makes the orbit tilt, just add the vectors of the upward push and the original centripetal force, and you’ll get a new centripetal force that when rotated 360 degrees has that tilted trajectory.
Loved !
this helped me really understand it thanks
Wonderful intuitive explanation. Thank you very much!!!
this is coriolis force right?
Where is the cone or funnel in the orbit illustration?
This Is wrong sir 🙏
perfect explanation
Helped some.
nobody explained it this good, thank you
I came here from an article about electron spin that tried to explain angular momentum and the precession it causes in a magnetic field. I wanted to understand this better since we briefly touched upon it in our radiology class regarding MRT and it made no f*cking sense there. I think I understand it much better now, thank you.
This is so much better than all the silly right hand rule, etc., explanations. So many people apply the rules and think they understand the phenomenon. If you can't visualize and explain in words what is happening, you don't understand. Good job. But this is not an intuitive explanation. Intuitive means you can predict an outcome without understanding why. The calculated outcomes are intuitive. This is an analytical explanation.
I still don't get it.I'll keep trying. Thanks for trying to explain it.
Great and concise explanation! An interesting consequence of this is that applying torque perpendicularly to a vector of angular momentum will result in precession movement perpendicular to both. Also, KSP is truly a great example of how a game can be both entertaining and teach you a lot, at least on the intuition side of things.
I liked this video just as he made a analogy to KSP
That was great! The example you gave was definitely very understandable, but why does the force vector point directly in that direction rather than producing a torque in that direction?
Thank you so much
👏🏽👏🏽👏🏽
At 2:25, can you explain why the force is away from string at "top" of wheel and towards string at "bottom" of wheel. How does that make the wheel orient vertically on the side at that time sig, rather than the wheel standing to the left side (the rotational velocity/momentum affects how vertically oriented the rotating wheel/disc/orbit competes). In the example of the satellite, what is the example source of the force that results in the angular tilt (right up, left down)? That limits my intuitive understanding, without knowing what force you're using as an example for the satelitte. If that's the same as the precession on the wheel, wouldn't the orbit angle be continually changing it's angle, ie, wouldn't the orbit itself continue to rise on the "right" side and fall on the "left" side, when if viewed from the perspective in the video would make the orbit appear to be rotating counterclockwise?
I've been trying to understand this since forevaaa. Thank you
It makes sense how the torque changes its axis of rotation like that, but why does that change result in the wheel spinning around?
I feel very confused. (I have just a-level) In space, there is no force presented in 2:10.
This video is a godsend. Explanations in the books for physics majors (Kleppner/Kolenkow, Ohanian, Young/Freedman) in my opinion all fail to explain it properly. Walter Lewin simply states it is 'unintuitive'. Shame on them all and many thanks to you!
Great explanation mate. Are you from NZ?
Best Explanation! Very Helpful! Thank you so much!
wow thanks for the explanation, it's very intuitive :)
Great little video, and excellent (if not very fancy-looking) visuals. Thank you!