Freaky physics

[Ariel Badger]

Click I have had it explained but it still looks like magic.
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Bikers make great organ donors, get 115 on your licence today.

[pinkyfloyd]

It's smoke and mirrors.
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illuminateTHEmind wrote: I am just more evolved than most of you guys... this allows me to pick of things quickly which would have normally taken the common man years to master
Hockeystorm65:.well there are childish arguments...there are very childish arguments.....there are really stupid childish arguments and now there are......Pinkfloyd arguments!
Teflon-Mike:I think I agree with just about all Pinky has said.

[Rigga]

Very cool
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Current bike: Honda CBR 1100xx

[Ariel Badger]

I just bought some 10mm Neodymium magnets from ebay and have been amazing myself by dropping them down some 15mm Cu water pipe.
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Bikers make great organ donors, get 115 on your licence today.

[Im-a-Ridah]

Mine oscillates

https://image.made-in-china.com/4f0j00veYQwztdnroy/DC-Motor-RS-775-.jpg

[Chinaboy]

I've done this experiment too, it's amazing. Physics can be cool

[Lord Percy]

Studied all this last year.

It's to do with how a magnet passing near a circuit can cause a current, and also how a current has its own magnetic field, 'because physics said so'.

So when you drop the magnet through the pipe, it pulls the electrons in the copper which causes a current. This current then gets its own magnetic field which opposes the magnetic field of the actual magnet.

So it's like putting two opposing magnets against each other. You get that cool resistance where they repel each other without touching. Hence the magnet is forced to slow down as it goes though the tube.



The reason the magnet doesn't drift down slowly when it's dropped on the outside of the tube is because the field created is not equal on all sides, unlike when it passes through the centre. So when it gets dropped it is slightly repelled away from being next to the copper tube and the 'magic' doesn't happen. You can see it gets repelled a bit by the way it falls.

[Rogerborg]

[The Shaggy D.A.]

[c_dug]

We have a demonstration in the museum called "floating in copper" which is very similar, it's quite fun to play with in the morning before the proles arrive.
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[c_dug]

I took five minutes out of my (not) very busy morning to show you the exhibit I was on about:

https://i235.photobucket.com/albums/ee81/paddy2007dug/DSC_0004_zps6d99a2f4.jpg

https://i235.photobucket.com/albums/ee81/paddy2007dug/DSC_0005_zps9774d65c.jpg

The video isn't fantastic quality, but take a look if you like:clicky. With two hands free you can manipulate it a lot easier, you can spin the neodymium magnet and move it around like a tiny shiny UFO
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[Rigga]

[Pete.]

[Ariel Badger]

I have 5 X 10mm diameter magnets stacked up and they take about 20 seconds to drop through 15mm OD Cu water pipe.
magnets
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Bikers make great organ donors, get 115 on your licence today.

[Sload]

Come on badger, lets have a video
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Honda Varadero >> Triumph Speed Four >> Honda CBR1100xx

[The Wobbly Orange]

I'm currently training to be an aircraft avionics tech. This experiment is one of the first things you are shown when studying electromagnetism. It's the same principles that make motors and generators work.
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