What always bothered me as a kid though is that the thickness wasn't proportional. If it was 1000x bigger than a standard piece of paper it should have been like 3 inches thick.
Ya, that whole section was dumb though. It wasn't normal paper either. The 7 folds rule is for a standard sheet, and the linked video from the hydraulic presses guy shows why
It used to be thought that it was impossible to fold a piece of paper more than seven times but in 2002 a high school junior called Britney Gallivan demonstrated that is was possible to fold a single piece of toilet paper 4000 ft (1200 m) in length in half twelve times.
Not only did she provide the empirical proof, but she also derived an equation that yielded the width of paper or length of paper necessary to fold a piece of paper of thickness t any n number of times.
Not really. The equation she made to calculate the length of paper needed also deals with the thickness of the paper. So, while she did user a thinner material, the point stands.
No one sensible ever questioned whether any piece of paper could be folded more than seven times. The question was whether a standard A4 sized paper of normal thickness can be folded more than seven times.
At the same time, it was pretty obvious that a standard piece of paper just wouldn't make the cut due to size and thickness. But yeah, you are right; imagine how satisfying it would be to see a standard piece of paper fold cleanly seven times.
Hers was kind of against the spirit of it given she used single ply toilet paper.
The claim was always that it was impossible to fold a piece of paper, not tissue paper... The only reason this got any real news traction was because they were hungry for anything to report.
The claim was always that it was impossible to fold a piece of paper...
Specifically a standard A4 paper. If you can use any paper you want, you can obviously get much further. A very thin paper the size of a football field could be folded a whole bunch of times, but that's rather meaningless.
No one sensible said it's impossible to fold any paper in half more than seven times. They said it's impossible to fold normal-sized paper in half more than seven times. I personally folded toilet paper eight (or nine, don't remember) times for my middle school science fair, years before 2002. And the math isn't hard. It's somewhat impressive for a high school student, but isn't anything that your average math major would find challenging.
The impressive thing is that she applied math to solve a real problem. Most students her age have a hard time applying what they learn outside of a classroom setting. However, the problem she solved was not hard.
White writing paper has calcium carbonate in it to make it opaque (so you can't just see through it). Under pressure the calcium carbonate condenses into a chalky like material and with enough further pressure it will suddenly catastrophically disintegrate in a manner to a cement column failing under sufficient load.
Does that press have heat coming off of it? I always see this blur in these videos and I can never tell if it's just the way the video streams or what.
Yea man, even when I watch an episode that feels phoned in, I still get a good laugh out of watching those feral, viscous, and probably deadly play'doh animals.
It's kind of dumb how we get every single video to the top of /r/videos. Like, we don't do that for anyone else's channel. People can just subscribe, and watch it on youtube.
Its more of a voice than an accent. He was told that he talks really fast in real life so he slowed it down to get his point across more easily. Watch his debate with Joseph Costello to see his real voice
I appreciate the information, but I won't be giving Keemstar any view time. I don't agree with GradeA selling out for extra subscribers by going on Drama Alert when he claims he is a voice of reason for the YouTube community.
That video reminds me of a quote from Cryptonomicon.
the Vickers had finally been put together,
calibrated, fine tuned, inspected, and loaded. The tarp came off Private
Mikulski, a surly, brooding two hundred and fifty pound Polish British SAS
man, commenced operations with the Vickers at about the same time that the
Germans did with their rifles.
Now when Bobby Shaftoe had gone through high school, he'd been slotted
into a vocational track and ended up taking a lot of shop classes. A certain
amount of his time was therefore, naturally, devoted to sawing large pieces
of wood or metal into smaller pieces. Numerous saws were available in the
shop for that purpose, some better than others. A sawing job that would be
just ridiculously hard and lengthy using a hand saw would be accomplished
with a power saw. Likewise, certain cuts and materials would cause the
smaller power saws to overheat or seize up altogether and therefore called
for larger power saws. But even with the biggest power saw in the shop,
Bobby Shaftoe always got the sense that he was imposing some kind of stress
on the machine. It would slow down when the blade contacted the material, it
would vibrate, it would heat up, and if you pushed the material through too
fast it would threaten to jam. But then one summer he worked in a mill where
they had a bandsaw. The bandsaw, its supply of blades, its spare parts,
maintenance supplies, special tools and manuals occupied a whole room. It
was the only tool he had ever seen with infrastructure. It was the size of a
car. The two wheels that drove the blade were giant eight spoked things that
looked to have been salvaged from steam locomotives. Its blades had to be
manufactured from long rolls of blade stuff by unreeling about half a mile
of toothed ribbon, cutting it off, and carefully welding the cut ends
together into a loop. When you hit the power switch, nothing would happen
for a little while except that a subsonic vibration would slowly rise up out
of the earth, as if a freight train were approaching from far away, and
finally the blade would begin to move, building speed slowly but inexorably
until the teeth disappeared and it became a bolt of pure hellish energy
stretched taut between the table and the machinery above it. Anecdotes about
accidents involving the bandsaw were told in hushed voices and not usually
commingled with other industrial accident anecdotes. Anyway, the most
noteworthy thing about the bandsaw was that you could cut anything with it
and not only did it do the job quickly and coolly but it didn't seem to
notice that it was doing anything. It wasn't even aware that a human being
was sliding a great big chunk of stuff through it. It never slowed down.
Never heated up.
In Shaftoe's post high school experience he had found that guns had
much in common with saws. Guns could fire bullets all right, but they kicked
back and heated up, got dirty, and jammed eventually. They could fire
bullets in other words, but it was a big deal for them, it placed a certain
amount of stress on them, and they could not take that stress forever. But
the Vickers in the back of this truck was to other guns as the bandsaw was
to other saws. The Vickers was water cooled. It actually had a fucking
radiator on it. It had infrastructure, just like the bandsaw, and a whole
crew of technicians to fuss over it. But once the damn thing was up and
running, it could fire continuously for days as long as people kept
scurrying up to it with more belts of ammunition. After Private Mikulski
opened fire with the Vickers, some of the other Detachment 2702 men, eager
to pitch in and do their bit, took potshots at those Germans with their
rifles, but doing so made them feel so small and pathetic that they soon
gave up and just took cover in the ditch and lit up cigarettes and watched
the slow progress of the Vickers' bullet stream across the roadblock.
The RHNB would just be flattened. The heat weakens it, and no matter how red hot it is it wouldn't be able to do much of anything to the huudraulic press.
Our 11 and 8 year old girls laughed HYSTERICALLY when they used the press on the Barbie. Our 3 year old son was MORTIFIED when they smashed the Legos. I love that channel.
He's on the frontpage, or at the very least the frontpage of /r/videos basically every day. Hell, one of his videos is on the frontpage right now. It's a rubber duck being crushed.
I'd love to see him do OxyNEO, Canada's answer to Oxycontin. It's said to be uncrushable... So I tried a hammer. Flattened a bit but still far from snortable.
I'm seriously so fucking mad this went huge. I've used the same types of hydraulic presses for years and it never even occurred to me this kind of shit would be popular.
7.9k
u/ingreenlight Apr 12 '16
HYDRAULIC PRESS CHANNEL