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Self Siphoning Beads


Via Self Siphoning Beads.

Dieser Beitrag hat 179 Kommentare
  1. When the beads hit the ground, energy transfers from the ground to the
    beads and up through the chain. you can see that it builds up power, it
    starts low then gets higher.

  2. Dear Steve, Would this also work with a 2.4mm bead chain (instead of the
    4.5mm size you used)? Thanks in advance for your answer!

  3. Steve, I am a Cub leader with Scouts in Canada and would like to use a
    demonstration like this in our Science presentation. Where did you get that
    length of chain from?

  4. more the height of jar (potential energy) ->higher the final velocity ->
    higher the momentum -> more the height of loop

  5. are these pretty much the chain you would get on a pull chain light switch
    or something? because i really wanna give this a go….

  6. *The ‚Anti-Gravity‘ Bead: What if we quickly tied the first bead that
    touched the floor to the last and kept bringing the fallen beads back to
    their initial Rest Position?*

    A longer explanation of this experiment found at Amazing bead chain
    experiment in slow motion – Slo Mo #20 – Earth Unplugged

  7. Great video. One thing bugs me as a physicist: why is the loop not touching
    the side of the jar. Normally it should be pulled down by the falling part
    of the chain until it meets resistance: the side of the jar. Now it even
    looks like the loop is pulling the beads up from the jar.
    Personally I think that the falling part of the chain is pushing itself up
    against the floor, and pushes the looping part up a bit from the jar. This
    could be tested by throwing them out from a great heigth, like the roof of
    a high building, to see if the loop rises before the chain hits the ground.

  8. So, the faster the chain is being pulled downwards, the higher the bow will
    be, right?
    But it needs a place from where it can „push“ upwards.
    Would the chain be floating, then it couldnt work, if i understand it
    correctly.
    This is really amazing, thanx a lot for showing us.
    Science is really cool!

  9. Это как? У кого есть такая длинная цепочка? Я хочу сам так сделать!

  10. scrolling through comment section is a disaster. „magic“ „physics!“
    „amazing!“ ………… shows the most of the vocal representatives of our
    humanity are simple-minded or just have no knowledge of simple physics.
    maybe they were sleeping when the professor’s mouth was moving.

  11. Try dropping the container of beads halfway down at a higher hight. I don’t
    think we will see it arch simultaneously while the container drops.
    But…Just do it!

  12. I wonder what happens if you put water in the jar and attempt the same
    thing.
    I would do this myself, but I don’t have 50m of bead chain to attempt it.

  13. Same here,sent by Sci-show.:D
    This is cool and now I’m going to the other video that explains more about
    this.

  14. Physics is fun. Now it makes beads jump up before they go down.
    Try figuring out why this effect happens before peeking at the explanation
    video.

  15. Hi, I am currently working on the development of a new television series
    for Discovery. We would be interested in including an extract of the above
    video in our programme and I wonder if you can tell me whether this might
    be possible? Check your inbox for Details, thanks

  16. The explanation is actually quite simple – this happens because this
    particular type of chain (hollow beads connected to each other with stiff
    rods) has a limited bending radius (it is the „ceiling fan pulling switch“
    kind of chain). Just sliding down the edge of the jar would require a
    sharper bend for the chain than it can do, so the only way for the chain to
    be pulled out of the jar (by the falling part of the chain) is to do this
    in a wider arc. the speed of the falling chain offers lots of kinetic
    energy to the process, which causes the arc to rise way above the jar; the
    limited chain bend kind of „whips“ the chain out of the jar. So this also
    means the faster the falling section, the higher the arc will rise out of
    the jar (as we actually can see on other videos of this phenomenon).
    Ultimate proof for this explanation: try this test with a chain that
    consists of beads held in place by a thin cotton thread but with each
    bead fixed to the thread at regular intervals spaced about 1.5x the bead
    diameter (thus allowing for a much sharper bend radius). Such a chain will
    NOT show this phenomenon.

  17. It is logical if when looking at the equations that describe that. I love
    when classical mechanics yields surprising results that is true.

  18. Hi, I went to your lecture in cam bridge for science week on Sunday and I
    was thinking about it on the way home when I noticed. I don’t know how long
    polymers are, can one molecule be for example a meter long.
    Was the tape made of molecules as long as the tape going longways or loads
    of shorter (but still quite long) molecules going longways.

  19. Shitty audio. Shame on you. You cared enough to light it decently, but
    didn’t care about us with ears. Try again.
    Good journey.

  20. Ugh… I ordered 3.2 mm chain. I noticed you commented 4.5. Do you think
    3.2 will have the same effect?

  21. Is there a way this can be done in full circle as in have firstly a chain
    that is really long and is one singular loop, a beaker to hold the mass,
    with a hole in the bottom so the mass weight doesnt let it slip through, im
    thinking some sort of coil shape…. perpetual motion could this be turned
    into free energy or does physics dictate no 🙁

  22. This is also called the „chain fountain effect“ which sounds marginally
    better than the „self-siphoning beads“ effect.

  23. I presume this is why, if you have an old-fashioned bathplug and chain, and
    try to put the plug on the edge of the bath, if any of the chain slips off
    the edge, the chain and plug end up jumping back into the bath.

  24. The theory presented by Professor Mark Warner and Dr.John Biggins from the
    University of Cambridge is wrong!
    1) The chain used by Steve Mould has round beads, thus it should not work
    according to their theory, but it does work!
    2) The suggestion that the chain is „pushed up by the pot“ is absurd, a
    complete furphy and not in compliance with any law of physics.
    3) To suggest that the centripetal force has something to do with it while
    ignoring the centrifugal force is also absurd, another furphy to confuse
    the public.
    4) You may have noticed that the „macaroni chain“ performed a lot worse
    than the Mould chain, whereas it should be the opposite way round according
    to the theory.

    Here is the real theory why the chain creates a fountain and it works
    particularly well with a bead chain as Steve Mould has used, round beads
    with a short elastic connection.
    The chain moves at a constant speed, thus there is zero acceleration
    between each bead, with exception at the point where the chain is picked
    up. At this point a bead is suddenly accelerated and as soon as it joins
    the preceding bead it is retarded again to zero acceleration, when joining
    the synchronous speed of all other moving beads.The momentum imparted onto
    the accelerating bead will be transferred to the preceding bead which then
    provides the force required to push it vertically up and create the
    fountain..

  25. it’s funny when people say this is fake they should probably do some
    research before jumping to conclusions

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