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Baalim Mexico. Oct 21 2010 22:01. Posts 34262 | | |
The seal is obviously not the problem lol... this cannot work because there is no perpetual movement machine so the physics are wrong, the seal could exist and that still shouldnt work, but why?
actually i dont even get why it needs another water chamber with a seal |
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daysare Poland. Oct 21 2010 22:13. Posts 670 | | |
i guess asdf got why this shouldnt work right. ye teh water chamber is really a shady shit |
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Baalim Mexico. Oct 21 2010 23:25. Posts 34262 | | |
| | On October 21 2010 21:13 daysare wrote:
i guess asdf got why this shouldnt work right. ye teh water chamber is really a shady shit |
no damnit, its not the seal, you could easily make romboic figures instead of spheres and a working seal... sealing is not an issue... the machine has to go someway against the basic laws of physics, its not a practical ting like sealing. |
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daysare Poland. Oct 21 2010 23:33. Posts 670 | | |
i didnt mean the seal either. just the buoyancy of the object filled with air combined with the upward pressure of water is probably the key thing |
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Oly United Kingdom. Oct 22 2010 00:01. Posts 3585 | | |
Immersing the ball into the water at the bottom needs force to overcomes two things: displacing it's volume in water and overcoming the upward push due to density difference - only one of these is countered by the already submerged balls.
Repicture the experiment with the balls entering a tank of water horizontally and then travelling up. Now take it to the extreme and imagine the balls filled with water instead of air. Now the submerged balls produce no force, but it would still take energy for the new ball to enter the tank, having to displace it's volume in water to get in.
edit: To clarify, it won't work because the submerged balls produce a force proportional to the difference between their density and that of water, whereas submerging a ball must overcome that exact same force and another additional force proportional only to it's volume. |
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| Researchers used brain scans to show that when straight men looked at pictures of women in bikinis, areas of the brain that normally light up in anticipation of using tools, like spanners and screwdrivers, were activated. | Last edit: 22/10/2010 00:13 |
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Baalim Mexico. Oct 22 2010 00:17. Posts 34262 | | | |
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Jas0n United States. Oct 22 2010 02:18. Posts 1866 | | | |
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luddite United States. Oct 22 2010 06:25. Posts 398 | | |
| | On October 21 2010 23:01 Oly wrote:
Immersing the ball into the water at the bottom needs force to overcomes two things: displacing it's volume in water and overcoming the upward push due to density difference - only one of these is countered by the already submerged balls.
Repicture the experiment with the balls entering a tank of water horizontally and then travelling up. Now take it to the extreme and imagine the balls filled with water instead of air. Now the submerged balls produce no force, but it would still take energy for the new ball to enter the tank, having to displace it's volume in water to get in.
edit: To clarify, it won't work because the submerged balls produce a force proportional to the difference between their density and that of water, whereas submerging a ball must overcome that exact same force and another additional force proportional only to it's volume. |
No that doesn't work because there's many more balls lifting upward, and only 1 being submerged at a time.
I think the real reason has to do with the belt mechanism. You can't just tie them together with string because they're only lifting. you need something rigid like a rubber belt so that they can push on the one above them. But then that rubber belt has to redirect that force around a circle, and downward in the opposite direction, which doesn't work. They're all the same object now, so you can't create any net angular momentum by pushing within that object. There's a net force up, and that's it. |
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Garfed Malta. Oct 22 2010 08:05. Posts 4818 | | |
This is ROFL "no discussion" Thread .
Stop this useless blabbing about trolling physics from 4chan comics. It was obviously meant to be a joke, thats why it was posted here. |
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SakiSaki  Sweden. Oct 22 2010 08:57. Posts 9685 | | |
wow thats the best troll-physics ive seen, Ruined an entire page in the ROFL-thread. |
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OjKa United Kingdom. Oct 22 2010 08:59. Posts 210 | | |
it will never be the same again |
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dogmeat Czech Republic. Oct 22 2010 09:02. Posts 6374 | | |
| | On October 21 2010 20:23 Breeze wrote:
Show nested quote +
On October 21 2010 19:22 dogmeat wrote:
the only problem is the seal on the left |
Haha if that was the only problem, don't you think it would have been solved by now, the whole science/technology world would have been working hard to build a seal that lets this perpetuum mobile work...
Can't really think of an intuitive reason why this can't work, probably the whole chamber displacing all this water creates huge pressure as someone else said and incredible force is needed to force something through the seal to the water around it. And this pressure will increase a lot with depth.
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thats pretty much what i said lol |
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Jas0n United States. Oct 22 2010 09:28. Posts 1866 | | | |
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Oly United Kingdom. Oct 22 2010 09:51. Posts 3585 | | |
avoiding derailment see spoiler
+ Show Spoiler +
| | On October 22 2010 05:25 luddite wrote:
Show nested quote +
On October 21 2010 23:01 Oly wrote:
Immersing the ball into the water at the bottom needs force to overcomes two things: displacing it's volume in water and overcoming the upward push due to density difference - only one of these is countered by the already submerged balls.
Repicture the experiment with the balls entering a tank of water horizontally and then travelling up. Now take it to the extreme and imagine the balls filled with water instead of air. Now the submerged balls produce no force, but it would still take energy for the new ball to enter the tank, having to displace it's volume in water to get in.
edit: To clarify, it won't work because the submerged balls produce a force proportional to the difference between their density and that of water, whereas submerging a ball must overcome that exact same force and another additional force proportional only to it's volume. |
No that doesn't work because there's many more balls lifting upward, and only 1 being submerged at a time.
I think the real reason has to do with the belt mechanism. You can't just tie them together with string because they're only lifting. you need something rigid like a rubber belt so that they can push on the one above them. But then that rubber belt has to redirect that force around a circle, and downward in the opposite direction, which doesn't work. They're all the same object now, so you can't create any net angular momentum by pushing within that object. There's a net force up, and that's it.
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Think of it in terms of the initial potential energy of the ball, like with calculating the velocity of a falling stone at school. The non-obvious process here is the raising of the water level, giving it a potential energy, when we immerse a new ball. This energy is then released by the rise of the ball (the falling of the water around it) balancing the equation in the normal way. Every ball must enter and every ball must rise. So the system may move a bit at the start depending on the initial set up, but cannot be continuous with >0 friction. The air tank on the left is cunning but irrelevant - we can see through this conservation of energy method that it takes the same energy to shove a ball into the higher pressure water at a lower depth as it does to immerse it at the surface and then push it down, and I'm sure this could be calculated directly but I can't be bothered, it would not be nearly as elegant, and when you'd done it, it would anyway by definition reduce to the balancing energies equation after all that work.
I'll leave this now, it is the rofl thread after all.
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| Researchers used brain scans to show that when straight men looked at pictures of women in bikinis, areas of the brain that normally light up in anticipation of using tools, like spanners and screwdrivers, were activated. | |
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Jas0n United States. Oct 22 2010 11:15. Posts 1866 | | | |
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tapatapaz Brasil. Oct 22 2010 11:35. Posts 1279 | | |
understanding sarcasm requires a lot of intelligence, i mean it.. its not for everyone |
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| And what does self awareness have to do with anything you retard? srsly stfu. - baal | |
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egood United States. Oct 22 2010 13:39. Posts 1883 | | |
DISTRICT 9
ITS A DOCUMENTARY |
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NeillyJQ United States. Oct 22 2010 14:16. Posts 8947 | | | |
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| Just remember you need to be god damn sure about their tendencies. -Artanis11 http://www.pocketfives.com/profiles/neillyaa/ | |
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i laughed when buddy told ben not to have kids hahaha |
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anarki Belgium. Oct 22 2010 19:52. Posts 288 | | | |
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| The sword is more important than the shield, and skill is more important than either. The final weapon is the brain. All else is supplemental. - John Steinbeck | |
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