10 Practical inventions

[@physicsfun]

Hello Everyone! I bet many of you can't answer this 02:55 Let see how many get this right! Where are you all from ?

[@коткотофеич]

ответ прост) внешняя окружность фиксирована с внутренней а соответственно вращательный момент один а радиус разный в итоге при вращении внутренней оси передаточное число равно внешней а качение диска выполняет внешняя окружность) все редукторы выполняются на этом принципе) маленькая шестерня вращает большую увеличивая вращающий момент)))

[@associatedblacksheepandmisfits]

The smaller disc is using the larger one's circumference not it's own. Fake question really. Greetings from Scotland 😊

[@lukatolstov5598]

From 🇺🇦.

[@tassiodrigues]

Brazil 🤗

[@wombat.6652]

The smaller disc is actually traveling a smaller distance. The distance between the smaller disc's horizontal edge, and the edge of the groove at both ends. Hello from Australia.

[@androidlogin3065]

3:30 The important thing is the external circunference that rolls, that is the legnth of movement, each lap is one full turn, 2*Pi*Radius

[@LoneTiger]

5:30 I can get 1 mole from the ground and that mole will be equal to 1 mole unless I hit a nest, in which case there will be a lot of moles. 😹

[@just.jose.youtube]

Thanks for showing everyone your collection! 😊

[@physicsfun]

My pleasure!! Science is our everything. Nothing in the world is possible without science ❤️

[@androidlogin3065]

0:35 I love that levitating toys, but the ones that do not requiere any energy (no battery, etc), they are done by multiple magnets in attract/repulsion scheme that causes a special zone.

[@physicsfun]

Yes! Harry Potter magic simulated by the real magic of physics. Well- the wings don’t move, but it does float above the base. Magnets are involved of course- a control system in the base, powered by AA batteries, uses adjustable electromagnets and a Hall effect magnetic field sensor to levitate the snitch, and it’s pretty stable too.

[@drdca8263]

My understanding is one cannot use magnets alone, with no power, to levitate a thing without some other form of support or friction. I think you need some sort of powered thing to dynamically change the magnetic field, to keep the object in place. (Well, assuming only permanent magnets and ferromagnets. Paramagnetism is a different story.)

[@androidlogin3065]

@@drdca8263 With only magnets and no power you can make a hall effect (attract and repulse) and create levitation. It is an arrament of magnets in different orientations, it creates a zone where if you kove out (in any direction) a bit there is an attraction to that zone. It needs both parts to have multiple magnets. That is why i love that, because you can 'catch' with no contact... the effect is enough strong to 'hold' at a certain distance and gain to gravity (you can free rotate in 360º sphere one and the other will follow the move, up, down left, rigth, etc.), in other words, similar to what superconductors and magnet trap, but only with magnets on both parts. Of course both parts must have magnets in such way that they create that 'hold'. I wish i have i video link showing it, since it is really pretty yo see (not very complex design).

[@drdca8263]

@@androidlogin3065 That seems to contradict Earnshaw's theorem . It turns out in my previous reply, I remembered a detail wrong. It isn’t paramagnetism that provides an exception, but diamagnetism.

[@androidlogin3065]

@@drdca8263 Without diamagnetism it can be made an object (with multiple magnets inside it) that holds in place another object that also has multiple magnets in it, and let a paper pass throgth both, with enough hold to beat earth gravity. It is the way that magnets are set, they create a zone where magnetism has a 'lower' point, it more near repulsion gets higher, than atraction if more far attracition gets higher than repulsion. Both objects must be 'paired' in the sence of having magnets in such arraments. It is not just one magnet be hold in place.

[@Petri547]

Background music 10/10. Taustamusiikki 10/10 Ever since I subscribed I have enjoyed a lot.

[@physicsfun]

Glad you enjoyed ❤️

[@The_Legend47]

Rather UNEXPECTED appearance of Ievan Polka in this video.... _AND THERE IS NOTHING WRONG WITH THAT!_

[@sadunnakipoglu9471]

Thanks

[@markrichards7713]

The background music was very nice, appropriate.

[@MrDarwiniano]

Excellent music. 5

[@physicsfun]

Glad you enjoyed ❤️

[@asilva781]

Very nice again.

[@physicsfun]

Thanks again! Science is our everything. Nothing in the world is possible without science

[@lukatolstov5598]

3:31 Because smaller on bigger centers have same position, so edges move same distance. Unlike only small.

[@huuc7540]

yeah

[@DM-mb9jh]

Where could I buy that gas collection for emissions spectra? This would be perfect for some demonstrations in my class! Super cool!!

[@physicsfun]

Please read video description for details.

[@k.r.99]

The bots have taken over every channel now. It's horrible.

[@Axcyantol]

Yeah :/

[@VroomVR2024]

"Practical" . . . I do not think it means what you think it means. -Inigo Montoya

[@nevenlucic6238]

The outer circle is fixed with the inner one and, accordingly, the torque is the same and the radius is different, also when the inner axis rotates, the gear ratio is equal to the outer one and the outer circle performs the rolling of the disk. I'm from Montenegro 🇲🇪🇲🇪🇲🇪

[@Tyronsmusic]

3:36 Is that from thundmail

[@polydipsiac]

Yeah but it doesn’t have any of that interesting light shape projections outside of the disks

[@theisaacORP]

awesome videos

[@physicsfun]

Glad you like them! Science is our everything. Nothing in the world is possible without science ❤️

[@Paul-ou1rx]

I actually own the one used to torture flowers. It is most practical.

[@androidlogin3065]

4:58 La ciencia de hoy es la tecnología de mañana.

[@physicsfun]

La ciencia es nuestro todo. Nada en el mundo es posible sin la ciencia

[@fredericlemoine5299]

Génial

[@Patrocloide]

"La Ciencia de hoy es la tecnología del mañana "

[@physicsfun]

La ciencia es el conocimiento de las consecuencias y la dependencia de un hecho sobre otro.

[@CMD4WP]

No 9, Yes, that's the one.

[@romerotronic]

ummm I can't seem to find the levitating snitch... 0:33 Thanks, red arrow!!

[@physicsfun]

😁

[@davidmcdowell1791]

I quickly went from I can't buy something fast enough to I'll find something else to buy. Tried every link I could to get the density cube key chain. After several dead ends I give up. Anyways to provide links to the items in the information?

[@physicsfun]

Sorry for the inconvenience Thanks for feedback I will definitely work on it.

[@lukatolstov5598]

2:42 3 shadows!

[@Petri547]

Tämän päivän tiede on huomisen teknologiaa. 🇫🇮

[@physicsfun]

Tiede on kaikkemme. Mikään maailmassa ei ole mahdollista ilman tiedettä

[@dreggmancurien]

Leven Polkka

[@casadelacienciayeljuego3575]

Favor activar subtítulos en español

[@thomasbunn00]

10 “practical” inventions. Levitating golden snitch. I do not think that word means what you think it means.

[@DoubleD_83]

Yes ,I can't stand it to . The way that they not understand komma's and a point that refers to a end of a sentence . Abbreviations is a hard one for the genius ...AI 🤣😂 It's exactly what you think of how a robot would read . Just blabbing the sentence in the shortest time . I'm not impressed by AI for now.🤖🦾⚙️☢️