I bet no one disrupts your class. If they do, just break out this experiment. Haha. Love your videos! It great to see a teacher who is truly passionate about what he teaches! 👍🏻👍🏻
Honestly this is the coolest and most informative channel I've ever come across. You deserve way more views/subscriptions than you have, it's a shame, I wish more people were interested in physics and the way our world works. Either way, please keep doing what you do. Always looking forward to the next installment!
I remember my 9th grade teacher showing us this, of course I also remember helping him call for medical assistance after he missed the board and hit the table, your version was much better.
It's a very impressive demonstration. I remember my teacher doing the same demonstration in about 1967 when I was 10 years old. He also told us it was a demonstration about air pressure. I now have a very strong suspicion it is much more about inertia of the air rather than air pressure, per se.
I think the previous poster nailed it already - it's the vacuum created rather than the air pressure pushing down that's holding the board on the table. When you have a wider board it's creating more volume of vacuum compared to a narrow board. When you smack the hanging end you're creating an instant vacuum underneath the other end which pulls the paper around it down to the table top. This is also why smoothing out the paper seemed to make a difference. The idea of using a mesh screen as a working surface is an excellent one, or even using a piece of pegboard or plywood with holes drilled in it to allow air to pass through. There would be no vacuum formed so the board would just go flying again. I bet ya a dollar!
Roscoe Kane I was going to post this until I saw your comment. The vacuum created by the board is immediately filled with air if there is no paper, but the paper stops the air from getting in.
This is so cool, Well presented and VERY WELL explained! The only thing I would say is next time, with all the breaking and flying wood, wear safety glasses!! I would love to be in a science class with you!
Brilliant demonstration. I would suggest to put the wooden sheet in between two parallel high walls separated by the width of the wooden sheet, which will stop the air from getting underneath the wooden sheet. I like the paper demonstration, but it adds many other complications as the distribution of air pressure becomes complex . Sir, my congratulations, you certainly deserve great respect for bringing science to the school in this manner. Good luck and I do wish that there are many teachers in all schools doing what you are doing. These may be simple demonstrations but if one had to include the mathematics on them, learning Maxwell's equations and Navier Stokes equations will see this experiment to Ph.D levels. Well done Mr Bruce Yeany.
If there is any vacuum exits in our universe then, that means Its temporary thing like a newspaper because after you brake a board that is not necessary to hold a board a newspaper will be terminated. Holding an opposite and much more then an equal force of an air pressure will not hurt your paws but definitely hold distanced area of an object and short part will be easily break into a part. Very good. Nice education for students.
I've always pictured that as more of a vacuum that holds it down, but it all boils down to the same thing, pressure. In this case i pictured it being more negative pressure adhering the board to the table, than only positive pressure from above. But obviously it is both negative pressure when the wood tries to lift from the smooth surface, and positive pressure pushing on that small vacuum that sticks the board to the table, helping it stick a little bit more.
Bruce, love your videos and energy about the subject. You and I are of similar ages and many times I tell or show my kids this method of learning (hands on vs virtual). Just one suggestion, please use safety glasses. For your safety and demo the importance of it in each of your future videos. thanks
the board moves up, the paper seals between the board and the table stopping air rushing under the board. held down by a vacuum, the wider the wood the greater the vacuum caused by lifting. I like that one. you can stick a wall tile to a ceiling with adhesive and the vacuum holds it up there.
The wider board forces a larger space under it that air needs to fill, and the paper is blocking this area. With the smaller board, it doesn't take much volume to fill under it at all, and the paper can just slide up at a 90 degree with it.
I think it might have something to do with the ratio between the thickness and width of the board as well. I've seen this same experiment done before usually with just a wooden ruler that is maybe only an 1/8" or 1/16" thick by about 1" wide and it breaks every time without moving the paper. Also it may have to do with the type of wood used, the cut of the wood, and the size of the paper.
Astute observation, I was taught the "pressure against the paper" explanation, and accepted it without much further thought. But by Your "quick investigation" it's quite clear that it at least is not the entire truth. And I personally subscribe fully to Your explanation that the paper rather prevents air from rushing in under the stick, and this allows the board to "create suction" against the table surface. And it's this "suction between the board and the table" that is the actual "counteracting force", not the air pressure against the paper, "holding it down". One way to further establish if this the "suction of the stick" or the "pressure of the paper" is to, by some means, lessen the "direct contact" between the board and the table, thus lowering the "strength of the suction" but not changing the "pressure of the paper".Possibly this could be done by placing the board slightly elevated of the table surface, perhaps on a couple of toothpicks... All in all an enjoyable and educational video. Best regards.
I think it might be because there is a larger vacuum under the larger board. And with the same mass of air in larger vacuum the pressure difference with the outside will be greater.
It seems to me that the amount of air on either side of the board but under the paper is proportionally much higher in the narrow board. When you strike it, that air can fill the underside of the narrow board allowing it to move up before a vacuum is drawn in the area. With the wide board, the same air pockets to the side of the board is not enough to allow the wide board to travel very far before a vacuum maintains the position of the board. That idea could be tested on the smaller board by folding the paper to fill in the gaps on the sides of the board. I also wonder if the higher inertia of the board without a proportionally higher breaking force appreciably contributes to the results. Meaning, does the breaking force double but the inertia quadruples?
HI Dennis, I just had an impassioned disagreement on this piece with an old friend. We are both going to do some variations to try and convince the other of our points. It should be interesting to see the results. Should be out in January
Hi Bruce, I hope you will post the results here. Rather than breaking more boards you might make an easier test with a fish scale and notice the peak force before the board is displaced from the table. If I get around to it, I might try this test myself. As for a hypothesis, maybe it was the words on your newspaper that were so heavy.
Would this be a result of vacuum and the resistance of air rather than the force of air on it? Of course air pressure would also include vacuum but just represented by a negative #. My thought is that the newspaper may also help restrict the air from getting underneath the board by giving it a longer path to travel and create a "friction". What if you were to try the same thing using a piece of netting the same weight/size as the paper?
Hi Dustin, as you are suggesting, it is an imbalance in pressure. under the board would be a vacuum, on top, air pressure, with the paper restricting the air from getting underneath. netting would not work, several holes in the board and not covered by paper doesn't work either
Mr Yeany, I have a doubt. Can you please explain when you close a bottle , why doesn't it collapse on itself ? shouldn't it since the pressure outside the bottle is greater than the pressure inside .Thank you
The air you seal inside the bottle is already pressurized by the atmosphere from when the bottle was open. It will continue to press against the inner walls with that same pressure even once it’s separated from the outside air. If you sealed the bottle while it was in a vacuum, and then exposed it to the atmosphere, you would see it crumple like you expected (unless the bottle walls alone are stronger than the atmospheric pressure, like a thick glass bottle).
I wish he had said what kind of wood was used. I'm an eighth grade science teacher and we're working on a physics unit right now. I want to do this demo for the kids but I bought basswood (tilia or limewood depending on where you are) from a craft store. Turns out basswood is very springy. The board didn't move but it also didn't break. I did scuff up my pinky trying to chop it though. Balsa seems to weak for this and I can't find pine in these dimension near me.
I thought about doing that but all I have is a handheld circular. I managed to get it to work with a 12"x3"x3/16" piece of bolsa wood. Not nearly as impressive but it still gets the point across.
Could it be vacuum from the paper against the table around the board? You're obviously a smart man and can figure out where I'm going with that, so I'm sure I don't have to explain.
Hi Matt, I'm finding that I can do with just a small amount of paper around the board if I wet it. My thoughts are the job of the paper is keeping the air from getting under the board itself. I am planning another video on this to show it
Bruce, if it is a vacuum you would probably get the experiment to fail if the board protrudes on both sides of the paper. I would like to see you try that.
The surface area of the wider board allows more of the paper to come into contact thereby increasing the air pressure downwards.. Isint it ? It's all in the cross section.
transference of energy, a similar experiment can be performed by breaking a bottle over your head; the energy is transferred into the bottle so fast that you don't feel the shockwave through your head
is it air pressure or vacuum? if the paper had a mesh below it that would let the air pass through would its holding power be the same? I just had a brainwave: if you used a suction cup in the vacuum of SPACE would it still work? I think it would - any thoughts on this 3-second old idea?
air pressure pushes down against the top of the board, as the board lifts very quickly, it is a partial vacuum underneath it. Good idea about the mesh, it wouldn't work on the mesh screen. I have been trying a few new ideas with this, and found it still works if I greatly reduce the amount of paper sitting on top of the wood. A suction cup would not work in space, it needs to an imbalance of pressure, no air on one side air pressure on the other
Hey Bruce thanks for the answer. I do have a keen curiosity on this ever since my teacher did the holding water in an upside down glass with a sheet of paper. 1 - I have a sense that vacuum pressure or power may be stronger than air pressure. E.g. if it the pressure is 15 lb per square inch and a heavy duty plunger was used and had all the air sucked out i suspect that it would hold more than the 15 lb per square inch 2 - A plunger could be used to cause a vacuum and then put into a vacuum chamber to see what happens when all the air it taken out of the chamber. i suspect that the plunger will remain stuck as it is prevented from expanding not by the air pressure any longer as that has been removed but the seal preventing it from being able to pull in content to regain its full shape. If you do an experiment on this do let me know as that day in the classroom was 47 years ago ;)
you are hitting the board with the same force, but on the wide board there is more area, so the force per area is less. the paper is the same. the paper slows the air rushing in under the board, so you get a vacume. The paper can stop enough air to hold the large board, but not the small one. Perhaps a larger sheet of paper would be able to break the small board? surely if you reduce the size of the paper you'll get the big board moving the paper like the small one did
yes, it has been incorrectly explained that it is the total amount of air pressure on the paper that is holding the board down. The function of the paper is to keep air from getting under the board and the vacuum formed under the board is enough to break it. I show this better in the updated version of this demonstration. ua-cam.com/video/9XmPeYFotLM/v-deo.html
Do you think it might still work if you used cellophane? You _should_ be able to get a tighter seal with less material and it wouldn't hide the physics like paper does.
Doesn't the thickness of the board affect the result? I mean, couldn't you have the same result with thinner pieces that were also thiner in height? I am not sure if I am expressing myself correctly
Hello Andre, the thinner it is the easier it is to break, I will be making another video on this and that is a point that will be taking a look at. I will also try it with thicker pieces and see what happens
Bruce Yeany that makes sense. What I was trying to say is that small pieces all around maybe only need the piece of paper despite being easier to move. But I don't know as I study economics and not ciences
The air isn't pushing down on the plunger, it's the plunger pushing up against the air creating a vacuum. That's the difference. Same thing is happening with the piece of wood. The slower that air can get underneath it, the more vacuum is created.
Maybe, to add to the experiment, try smaller and smaller pieces of news paper, to find out how much the paper actually has to extend over the board. That is the one variable that didn't change in the experiment.
I know I would have enjoyed having an interesting science teacher like you when I was at school. My teacher's idea of a break from the textbooks was usually Electrical Bread board, battery, 2 wires and a bulb or coloured pens to draw atomic chemical bonds. I believe science can be the most interesting subject a child will learn in school, but an apathetic or lazy teacher can be off-putting for some.
it's been around forever and the explanation for it has been wrong for just as long. I have a future video planned to show a few variations and verify my thoughts.
Another thing maybe would be to tape an equivalent area of newspaper as the original experiment to the edges of the board, none on top, but so that the paper is perfectly flat on the table. After that test perhaps a few dowels under the paper to keep it from resting on the table just to see what happens. As an aside I wonder how much weight an open sheet of newspaper could lift if taped to a long ruler so as to lift along the entire edge?
Hi bruce, is this really because of air resistance against the board or because of small vacuum cavities created beneath the board??? I mean the wider the board the bigger vacuum cavities and hence more pressure is required to create and maintain one??? Isn't it??? ( assuming the air pressure trying to push through non porous paper and creating a glue like friction between the bench and paper)
Exactly. Now those kids will have smaller portions of baords. Less fiber. U=Monster (just in case i wasn't being ridiculous enough to make this obvious, I'm joking)
Bruce Yeany is a down-on-his-luck physics teacher who has just learned he has stage III lung cancer. Determined to ensure that his family will have a secure future, he embarks on a career of drugs and crime. Recruiting a former student as a partner, he churns out hundreds of pounds of the purest methamphetamine ever produced. But has Mr. Yeany found the formula for success, or just a recipe for disaster? Vince Gilligan presents: *Breaking Board*. (rated TV-MA)
Avarickan paradoxes defy sound logic, even if that logic is wrongly founded; most people would not hypothesize that a thin piece of paper on a stick is enough to resist the board's tendency to go flying off after a hit
I bet no one disrupts your class. If they do, just break out this experiment. Haha. Love your videos! It great to see a teacher who is truly passionate about what he teaches! 👍🏻👍🏻
Honestly this is the coolest and most informative channel I've ever come across. You deserve way more views/subscriptions than you have, it's a shame, I wish more people were interested in physics and the way our world works. Either way, please keep doing what you do. Always looking forward to the next installment!
Thanks Brandt, there are so many videos on youtube it's hard to compete. I still have several videos planned so I will keep going
Brant Holt
Bruce Yeany
I remember my 9th grade teacher showing us this, of course I also remember helping him call for medical assistance after he missed the board and hit the table, your version was much better.
It's a very impressive demonstration. I remember my teacher doing the same demonstration in about 1967 when I was 10 years old. He also told us it was a demonstration about air pressure. I now have a very strong suspicion it is much more about inertia of the air rather than air pressure, per se.
I think the previous poster nailed it already - it's the vacuum created rather than the air pressure pushing down that's holding the board on the table. When you have a wider board it's creating more volume of vacuum compared to a narrow board. When you smack the hanging end you're creating an instant vacuum underneath the other end which pulls the paper around it down to the table top. This is also why smoothing out the paper seemed to make a difference.
The idea of using a mesh screen as a working surface is an excellent one, or even using a piece of pegboard or plywood with holes drilled in it to allow air to pass through. There would be no vacuum formed so the board would just go flying again.
I bet ya a dollar!
This is a really cool demonstration of how air pressure can affect simple things around us.
Lukenblaz
Best teacher I ever had! Thanks for showing me the coolest parts of science! -Demitra condiles- AC alumni. class of 2014
Thanks Demitra, that was really nice to hear.
great work with videos, keep playing, keep having fun.
The paper just helps form a seal to prevent air from getting under the board. Broader board harder to get air under.
Try water to seal the board down.
Roscoe Kane I was going to post this until I saw your comment. The vacuum created by the board is immediately filled with air if there is no paper, but the paper stops the air from getting in.
You make science very interesting! Keep on the good work!!
thank you
Amazing demonstration! I definately will use this with my students!
4:24
It's so interesting how the board flew straight sideways. Like it was fired from a tube. 👀
thumbs up to the experiment and observation.
Mark my words, you will be known. Great video!
thanks, I had hoped people would like these.
This is so cool, Well presented and VERY WELL explained! The only thing I would say is next time, with all the breaking and flying wood, wear safety glasses!! I would love to be in a science class with you!
Congrats on 10k subs! You deserve more; I'm sure you'll get them soon. :)
Thanks kcufO
60k subs later
Brilliant demonstration. I would suggest to put the wooden sheet in between two parallel high walls separated by the width of the wooden sheet, which will stop the air from getting underneath the wooden sheet. I like the paper demonstration, but it adds many other complications as the distribution of air pressure becomes complex .
Sir, my congratulations, you certainly deserve great respect for bringing science to the school in this manner. Good luck and I do wish that there are many teachers in all schools doing what you are doing. These may be simple demonstrations but if one had to include the mathematics on them, learning Maxwell's equations and Navier Stokes equations will see this experiment to Ph.D levels. Well done Mr Bruce Yeany.
thank you Carmel, I am going to make a 2nd video on this piece and try some variations,
these videos are great, the only thing I miss is that being a science channel it should be metric so the rest of the world understand better
If there is any vacuum exits in our universe then, that means Its temporary thing like a newspaper because after you brake a board that is not necessary to hold a board a newspaper will be terminated. Holding an opposite and much more then an equal force of an air pressure will not hurt your paws but definitely hold distanced area of an object and short part will be easily break into a part. Very good. Nice education for students.
I hadn't seen that before. That's impressive!
Well, I learned something today. Thanks for the video!
Excelente, la cara de sorpresa en el experimento con la tabla delgada. Me pude reir.
Buen canal profesor, Felicidades.
Gracias Nixon Medina
I've always pictured that as more of a vacuum that holds it down, but it all boils down to the same thing, pressure. In this case i pictured it being more negative pressure adhering the board to the table, than only positive pressure from above. But obviously it is both negative pressure when the wood tries to lift from the smooth surface, and positive pressure pushing on that small vacuum that sticks the board to the table, helping it stick a little bit more.
Bruce, love your videos and energy about the subject. You and I are of similar ages and many times I tell or show my kids this method of learning (hands on vs virtual).
Just one suggestion, please use safety glasses. For your safety and demo the importance of it in each of your future videos.
thanks
you are a Superhuman teacher....👍
Ah. Learn a lot than I do at school. Nice experimentation stuff.
very nice conclusion
the board moves up, the paper seals between the board and the table stopping air rushing under the board. held down by a vacuum, the wider the wood the greater the vacuum caused by lifting. I like that one. you can stick a wall tile to a ceiling with adhesive and the vacuum holds it up there.
The wider board forces a larger space under it that air needs to fill, and the paper is blocking this area. With the smaller board, it doesn't take much volume to fill under it at all, and the paper can just slide up at a 90 degree with it.
you rock man. love your work😄
Thank you for your videos :)
You remind me of my favorite science teacher Mr. Mylott!!
awesome video!
Nice best teacher he is my teacher
your video is usefull for me, thank you very much
You could make money with this, amazing.
Good stuff, thanks!
I think it might have something to do with the ratio between the thickness and width of the board as well. I've seen this same experiment done before usually with just a wooden ruler that is maybe only an 1/8" or 1/16" thick by about 1" wide and it breaks every time without moving the paper. Also it may have to do with the type of wood used, the cut of the wood, and the size of the paper.
Astute observation, I was taught the "pressure against the paper" explanation, and accepted it without much further thought. But by Your "quick investigation" it's quite clear that it at least is not the entire truth. And I personally subscribe fully to Your explanation that the paper rather prevents air from rushing in under the stick, and this allows the board to "create suction" against the table surface. And it's this "suction between the board and the table" that is the actual "counteracting force", not the air pressure against the paper, "holding it down".
One way to further establish if this the "suction of the stick" or the "pressure of the paper" is to, by some means, lessen the "direct contact" between the board and the table, thus lowering the "strength of the suction" but not changing the "pressure of the paper".Possibly this could be done by placing the board slightly elevated of the table surface, perhaps on a couple of toothpicks...
All in all an enjoyable and educational video.
Best regards.
thank you, I want to revisit this experiment and try some other variations, I will give what you suggest a try
I think it might be because there is a larger vacuum under the larger board. And with the same mass of air in larger vacuum the pressure difference with the outside will be greater.
It seems to me that the amount of air on either side of the board but under the paper is proportionally much higher in the narrow board. When you strike it, that air can fill the underside of the narrow board allowing it to move up before a vacuum is drawn in the area. With the wide board, the same air pockets to the side of the board is not enough to allow the wide board to travel very far before a vacuum maintains the position of the board. That idea could be tested on the smaller board by folding the paper to fill in the gaps on the sides of the board.
I also wonder if the higher inertia of the board without a proportionally higher breaking force appreciably contributes to the results. Meaning, does the breaking force double but the inertia quadruples?
HI Dennis, I just had an impassioned disagreement on this piece with an old friend. We are both going to do some variations to try and convince the other of our points. It should be interesting to see the results. Should be out in January
Hi Bruce, I hope you will post the results here. Rather than breaking more boards you might make an easier test with a fish scale and notice the peak force before the board is displaced from the table. If I get around to it, I might try this test myself. As for a hypothesis, maybe it was the words on your newspaper that were so heavy.
Why is it a paradox??
I think the paper just prevents air to be sucked below the board. you could maybe try with a peace of cloth, that lets some air throught.
Grzegorz Kapica that's what he's saying
Would this be a result of vacuum and the resistance of air rather than the force of air on it? Of course air pressure would also include vacuum but just represented by a negative #. My thought is that the newspaper may also help restrict the air from getting underneath the board by giving it a longer path to travel and create a "friction". What if you were to try the same thing using a piece of netting the same weight/size as the paper?
Hi Dustin, as you are suggesting, it is an imbalance in pressure. under the board would be a vacuum, on top, air pressure, with the paper restricting the air from getting underneath. netting would not work, several holes in the board and not covered by paper doesn't work either
I think narrower wood piece makes the paper more aerodynamic while in motion, hence lesser resistance on the paper.
When you hit the board, it lifts the paper a little bit and creates a temporary vacuum. The bigger boards create bigger vacuums.
so size does matter
damn Mr. Yeany you a ninja.
This is sweet!
Mr Yeany, I have a doubt. Can you please explain when you close a bottle , why doesn't it collapse on itself ? shouldn't it since the pressure outside the bottle is greater than the pressure inside .Thank you
The air you seal inside the bottle is already pressurized by the atmosphere from when the bottle was open. It will continue to press against the inner walls with that same pressure even once it’s separated from the outside air. If you sealed the bottle while it was in a vacuum, and then exposed it to the atmosphere, you would see it crumple like you expected (unless the bottle walls alone are stronger than the atmospheric pressure, like a thick glass bottle).
I wish he had said what kind of wood was used.
I'm an eighth grade science teacher and we're working on a physics unit right now. I want to do this demo for the kids but I bought basswood (tilia or limewood depending on where you are) from a craft store. Turns out basswood is very springy. The board didn't move but it also didn't break. I did scuff up my pinky trying to chop it though. Balsa seems to weak for this and I can't find pine in these dimension near me.
HI Gary, it is pine, I had to use a table saw to cut it thinner.
I thought about doing that but all I have is a handheld circular. I managed to get it to work with a 12"x3"x3/16" piece of bolsa wood. Not nearly as impressive but it still gets the point across.
would you try that over a cooling rack to let the air in?
yes, in the next video
Could it be vacuum from the paper against the table around the board? You're obviously a smart man and can figure out where I'm going with that, so I'm sure I don't have to explain.
Hi Matt, I'm finding that I can do with just a small amount of paper around the board if I wet it. My thoughts are the job of the paper is keeping the air from getting under the board itself. I am planning another video on this to show it
Bruce Yeany yeah that's what I meant by the vacuum.
Bruce, if it is a vacuum you would probably get the experiment to fail if the board protrudes on both sides of the paper. I would like to see you try that.
I am planning a new video on this, thanks
The surface area of the wider board allows more of the paper to come into contact thereby increasing the air pressure downwards..
Isint it ? It's all in the cross section.
love ur Videos *-*
thanks
transference of energy, a similar experiment can be performed by breaking a bottle over your head; the energy is transferred into the bottle so fast that you don't feel the shockwave through your head
Hi Bruce, what do you suppose would happen if you did the same experiment, but on a porous table instead of the one you're using here?
HI Steven, good question, I am making a 2nd video on this and will try some other variations
good idea
How about using the same board but less newspaper? One variable at a time.
Hello Etienne, I'm planning to try another video with variations and see what happens
is it air pressure or vacuum? if the paper had a mesh below it that would let the air pass through would its holding power be the same?
I just had a brainwave: if you used a suction cup in the vacuum of SPACE would it still work? I think it would - any thoughts on this 3-second old idea?
air pressure pushes down against the top of the board, as the board lifts very quickly, it is a partial vacuum underneath it. Good idea about the mesh, it wouldn't work on the mesh screen. I have been trying a few new ideas with this, and found it still works if I greatly reduce the amount of paper sitting on top of the wood. A suction cup would not work in space, it needs to an imbalance of pressure, no air on one side air pressure on the other
Hey Bruce thanks for the answer. I do have a keen curiosity on this ever since my teacher did the holding water in an upside down glass with a sheet of paper.
1 - I have a sense that vacuum pressure or power may be stronger than air pressure. E.g. if it the pressure is 15 lb per square inch and a heavy duty plunger was used and had all the air sucked out i suspect that it would hold more than the 15 lb per square inch
2 - A plunger could be used to cause a vacuum and then put into a vacuum chamber to see what happens when all the air it taken out of the chamber. i suspect that the plunger will remain stuck as it is prevented from expanding not by the air pressure any longer as that has been removed but the seal preventing it from being able to pull in content to regain its full shape.
If you do an experiment on this do let me know as that day in the classroom was 47 years ago ;)
you are hitting the board with the same force, but on the wide board there is more area, so the force per area is less. the paper is the same. the paper slows the air rushing in under the board, so you get a vacume. The paper can stop enough air to hold the large board, but not the small one. Perhaps a larger sheet of paper would be able to break the small board? surely if you reduce the size of the paper you'll get the big board moving the paper like the small one did
yes, it has been incorrectly explained that it is the total amount of air pressure on the paper that is holding the board down. The function of the paper is to keep air from getting under the board and the vacuum formed under the board is enough to break it. I show this better in the updated version of this demonstration. ua-cam.com/video/9XmPeYFotLM/v-deo.html
Do you think it might still work if you used cellophane?
You _should_ be able to get a tighter seal with less material and it wouldn't hide the physics like paper does.
good idea, I am making a second video to try it
Doesn't the thickness of the board affect the result? I mean, couldn't you have the same result with thinner pieces that were also thiner in height? I am not sure if I am expressing myself correctly
Hello Andre, the thinner it is the easier it is to break, I will be making another video on this and that is a point that will be taking a look at. I will also try it with thicker pieces and see what happens
Bruce Yeany that makes sense. What I was trying to say is that small pieces all around maybe only need the piece of paper despite being easier to move. But I don't know as I study economics and not ciences
Huge Fan
You are amazing
Awesome! Are you left handed?
thanks again, yes, I'm a lefty
The air isn't pushing down on the plunger, it's the plunger pushing up against the air creating a vacuum. That's the difference. Same thing is happening with the piece of wood. The slower that air can get underneath it, the more vacuum is created.
BOARD BREAKING CHAMPION!!!
You should calculate the airpressure on each type of board
Maybe, to add to the experiment, try smaller and smaller pieces of news paper, to find out how much the paper actually has to extend over the board. That is the one variable that didn't change in the experiment.
that is a good idea, I'm going to try that
Yeah, and you could try with no paper as well.
I think that this is just cool
I know I would have enjoyed having an interesting science teacher like you when I was at school. My teacher's idea of a break from the textbooks was usually Electrical Bread board, battery, 2 wires and a bulb or coloured pens to draw atomic chemical bonds.
I believe science can be the most interesting subject a child will learn in school, but an apathetic or lazy teacher can be off-putting for some.
Dude is a ninja no joke
that was fucking awesome man!
Great..
1:52 & 5:37 This is a guy who loves what he does.
...or has dreams of being a kung fu hero.
Its the surface area of the board. A smaller board has to lift less surface area of the paper than a wider board.
did that as science experiment in the 5th grade(1960).
it's been around forever and the explanation for it has been wrong for just as long. I have a future video planned to show a few variations and verify my thoughts.
It might be interesting to tape small flaps of newspaper to each side of the board without any above the board.
thanks, I'm working on that now.
Another thing maybe would be to tape an equivalent area of newspaper as the original experiment to the edges of the board, none on top, but so that the paper is perfectly flat on the table. After that test perhaps a few dowels under the paper to keep it from resting on the table just to see what happens. As an aside I wonder how much weight an open sheet of newspaper could lift if taped to a long ruler so as to lift along the entire edge?
Hi bruce, is this really because of air resistance against the board or because of small vacuum cavities created beneath the board??? I mean the wider the board the bigger vacuum cavities and hence more pressure is required to create and maintain one??? Isn't it??? ( assuming the air pressure trying to push through non porous paper and creating a glue like friction between the bench and paper)
I will be trying it again to get more answers for this
You monster, kids in Africa could have eaten those boards.
Exactly. Now those kids will have smaller portions of baords. Less fiber.
U=Monster
(just in case i wasn't being ridiculous enough to make this obvious, I'm joking)
LOL, it was obvious the first time
All of the sudden your demonstration turns into an example of conservation of mass.
@@Turnip0739 I don't think kids in Africa can digest cellulose.
I work for the newspaper. Now I need to bring in some wood and try this
Why no goggles? You've got flying splinters!
Bruce Yeany is a down-on-his-luck physics teacher who has just learned he has stage III lung cancer. Determined to ensure that his family will have a secure future, he embarks on a career of drugs and crime. Recruiting a former student as a partner, he churns out hundreds of pounds of the purest methamphetamine ever produced. But has Mr. Yeany found the formula for success, or just a recipe for disaster? Vince Gilligan presents: *Breaking Board*. (rated TV-MA)
no
Ryan Cook knows how to cook meth
lolz breaking bad reference, good one
That's what I thought when I saw the title. :D
You maniac, i literally almost cried when i read "has stage III lung cancer", thank god i read the rest of the thing -.-"
Bruce Lee? Fkng no! My master is Bruce Yeany. He's second to none!
if my physics lessons back in my teenage years would been like that i would not have sleeped in every hour.....(sry for bad eng)
let's try 10 inch boards
nice karate skills
Aquaman did this same trick in Season 2 of the Superfriends.
i know... there is a hand under that paper... holding that board...
Who is he counting off for?!? 1...2...3...Comment
LOL, I wondered that too after watching it
That's not a paradox. Its just unexpected.
true, but I didn't name it
Bruce Yeany Fair enough.
Avarickan paradoxes defy sound logic, even if that logic is wrongly founded; most people would not hypothesize that a thin piece of paper on a stick is enough to resist the board's tendency to go flying off after a hit
thanks Em
o dang im early. nice vid doe
Wow you're quick, I just posted this 3 minutes ago
I stalk your channel for science fair ideas :)
Decent Gaming haha nice
I think the teacher learn to much martial art from Bruce ( Lee / Wayne )
^pretty shittty comment right here folks
im sorry cause my grammar looks very bad...
i love you buddy
+boooters , why...
you know we live on a flat and stationary earth surface bruce?
A karate master
who else was worrying that he may broke his hand by hitting on table?
I did hit the table once when I was demonstrating this for a group of teachers, didn't break my hand but it was sore for several days afterwards
yeah i had thought something like that but on the name of science it's worth giving...
*and thanks for your reply*
Who here after TikTok clip or shorts clips?
i take it you're a teacher.
If he is I bet he is everyone's favorite teacher lol, I know he would be my favorite
I teach physical science, this is my 40th year
Bruce Yeany middle or high school? middle right?
yes, middle
i read breaking bad on the title and clicked on it ....shit ..i thought he was going to be real life walter white