When I went through early grade-school in the early 1960s, we would often have a chance to buy books from Scholastic Book Services which still sells books to students. I mention the time period only to avoid the idea that Photoshop might have been used in a particular book that caught my eye: "Hurricanes and Tornadoes". It showed, among other things, post-tornado damage to trees, one of which had a drinking straw stuck in the actual wood. More recently but less precisely in my memory was a video of the Mythbusters folks performing a few tests along similar lines. Make what you will of the photo in the book, but the drinking straws of the day were paper, not yet plastic.
Ah, sounds like we were in grade school about the same time. I remember the scholastic books well but missed the one you mention. I hadn't heard about the drinking straw until posting this video, but it is one I look forward to trying, paper and plastic as well as some other items that might be fun..
It would be interesting to see if the straw could penetrate a soft wood, such as pine, using the CO2 fire extinguisher. Another excellent demonstration!
Thanks Lake N, I'm sure I'll try some version of this again, that is one I want to try. I've had a few mention about straw stuck into trees and fenceposts. I'd be interested to see how far they go in
Thanks, excellent as usual! I think the penetrating ability of the straw might depend a lot on the species, influencing the strength of the material, and possibly on the shape of the cut end, square or oblique. The moisture content could go either way, either improving the mass and resistance to shattering, or it might reduce the stiffness and cause it to bend on impact? As a child we found a six-foot length of three-quarter-inch heating pipe, and decided to try it as a pea-shooter, with balls of clay. We were quite surprised to find that they could go about 200 feet, and I seem to remember timing them at just under 100mph. Mercifully we didn't have a fire extinguisher to play with, as I don't thing the glazing in the neighbourhood would have been safe!
good points about the straw. I had a feeling that if it were fresher, I would get better results, I plan to test again. Your old peashooter sounds impressive. One of the interesting things I had kids try was a lesson on impulse using a peashooter. I had them start with a longer tube and then progressively cut it shorter, while shooting it the same way. nicely showed the distance was determined by the length of time the force was applied in the tube
@@YeanyScience Yes I think the rate of acceleration is quite slow. Of course there comes a time when lung capacity becomes the limiting factor ... and for some reason I took up freediving as an adult! :-)
Hell yeah. After a tornado went through Schoharie, NY back in 1989, I found an imprint of a fern plant that had been embedded in the asphalt road after the tornado had passed.
One potential limitation on the air compressor is the speed at which the valve is opened. Jörg Sprave, a German engineer and TH-camr who makes improvised weapons (sorry, "toys"), had a similar limitation when designing his pneumatic arrow launcher. That toy used a standard ball valve with hand lever for the release. Rather than making that a manual trigger in itself, he used rubber bands under extreme tension to pull it toward the open position, with a mechanical stop in place that was released by the primary trigger. Now, in all fairness, I think the kind of ball valve he used is inherently slower than the valve on your compressor. In addition, he charged his toy up past 4,000 PSI (which I think might be enough to supercriticize* nitrogen, but I digress). At higher pressures, the slower valve becomes more of a relative hindrance. For the record (and I think it probably _is_ a record), his toy managed to put one kilojoule of energy into his projectile. * Now I'm just messing around.
I think the simplest solution for the gas gun would be to increase the length of the barrel, so that there is more time to build up pressure before the projectile emerges from the end. But according to the gas gun experts, another limitation is the build-up of air in front of the projectile, which is why they use an evacuated tube with a light cap that the projectile knocks away. (They also use hydrogen as the propellant, because its maximum limiting velocity is higher than air.)
@@anotherfreediver3639 good insight. I agree that a longer barrel length is far more practical, especially if the volume of the barrel is still negligible compared to the capacity of the compressor.
I have read descriptions of straws being driven through wooden floorboards in an article written in the early 1960s. So not only plausible but extremely likely to happen. Tornado windspeeds are externally measured as an average using doppler radar. Locally within the core of a tornado windspeeds can be considerably higher than at the wall where most external measurements are made. Apparently fragile objects moving at speed can develop great penetrating power as some brief calculations using kinetic energy equations will show.
HI Michael, I was very impressed with the results of my first tests and plan to try some more "targets". The ability of the fragile straw able to do damage reminds me of the paper saw blade that I did a video on a couple years ago. As fragile as paper is, turning at 15,000 RPMs it could easily cut through several materials much harder than the paper
Bruce Yeany Thanks for the response. In addition to the kinetic energy contained in the straw, it is important to remember that the support structure is a cylinder which is essentially composed of silica and hence extremely rigid in compression. Revisiting the article mention earlier, I note that some straw stalks were driven through the metal casing of a domestic refrigerator. That really is a scary thought!
Would be interesting to see if there might be different kinds of straw available, or for alternative ideas, what might look like straw when embedded but be something else taken for a ride by the winds.
thanks James, I tried to use wheat straw in this case but you are right, I think there are several plants with more tougher stems out there. Wheat straw is hollow but there are several plants that have a solid core which would be more rigid.
After that video in Germany plastic straws were banned because they are deadly weapons... ☝️ Nice demonstration! What surprised me how stable they are around the longitudinal axis and they did not break!
Nice demo. I assume a tornado (as does any wind) will have smaller areas of even faster winds when air is reflected and/or channeled around various terrain and objects (hills, trees, buildings, etc.). It probably also depends heavily on how smooth and pointy the straw is. Some pieces seem to splinter more than others.
Hi Johny, good question, sorry but I don't have a good answer. I will check around and see if I can find out, or perhaps someone else will take provide it. anyone. know?
"Paper is opaque because there are mineral fillers in between the cellulose fibers, which are in a crystalline form. When surrounded by air, they appear opaque due to the higher difference in the index of refraction between the two. When wet, the paper appears translucent because there is a lower difference in the index of refraction between the crystals and the water, making it translucent." -> physics.stackexchange.com/questions/137628/why-is-wet-paper-transparent
Very good video as always. 🤗 Myth busters used a long, long tube to fire straw into and maybe threw a palm tree trunk. - I wonder if using a long long tube that's not larger than your blowing capacity, would it be more effective? (Would also be neat to show a representation to show the lung capacity of a human maybe a cylinder with a float or piston to make how much volume, even flow rate with using frames per second math) or if it would create too much drag on the air trying to flow threw the pipe? - Also maybe demonstrate a Stirling pump I think its called, to show how a fluid/air/water drag and friction can be used for work, as a pump or turbine (maybe a holy tube with cd's glued to it. If use the clear discs it might be a good demonstration on how the centrifical / centrifugal forces act on the fluids. Might need to power it with the drill to get it fast enough (as a water pump. And can demonstrate just pushing a fluid threw it would drive the shaft "to make work". - And... how steam can be made with a cavitation water heater, as the holes create cavitations and ultrasonic bubbles that are like tiny implosion's, creating small vacuum implosions possibly plasma, evaporating parts of the metal surface of the rotating drum slowly away. Well they are just ideas... the last one is probably not easily done on low to no budget. 🤔😣
Pumpkin and squash in the field would still be attached to the plant with MUCH softer skins. The removal causes the fruit to cure and the skin hardens. I think you need to try this on plants with the fruit still on them. I believe the farmers.
Good think you pulled in the compressed air, coz I was just experimenting with balloon pump with removed valve and added a tube as barrel and was able to put a bamboo skewer through a roll of paper towel just using my hand to apply pressure force to the piston as quick as a I could.
In 1988 New Zealand and other Pacific Islands got hit by a once in a century Cyclone, Cyclone Bola. Now, these are not CONCENTRATED storms like we see touch down, in the USA, where the sky sprouts a black finger and write "inescapable death" along a twisting track . . . ( honestly, why do you guys not get on a plane and move to Canada ? ) but paradoxically they do more overall damage because their energy is spread over a huge front. And the week before the cyclone my dad had brought, and stacked up in his scrapyard, an entire factory-skin of 6 foot sections of scrap corrugated iron. About a thousand sheets. Which simply vanished into the sky. We never heard of any pumpkins getting dissected, OR in fact of the sheets touching down ANYWHERE. They seemed simply to have "gone".
"It's not THAT the Wind is blowin' 150mph…it's WHAT the wind's blowin'. If you get hit by a Volvo, it doesn't matter how many sit-ups you did that mornin'." - Ron White
On this note; were the pumpkins in the field immature? This would explain as to why the straw imbedded itself. Softer skin=easier for hard straw to decimate- much like the tomato.
The tornado came through in July, so it was a bit early for it to be pumpkins. My impression that there were cantaloupes and melons in the field and and few other types of vegetables around but it was unclear what they were or how ripe they were
In one kids' encyclopaedia back in the 1950s it was stated that while it would be impossible to push a candle through a wooden door, the same candle fired from a shotgun would go through the door, no problem, so guess a similar principle applies. Not suggesting anyone should try a practical demonstration but think the kids' books were much more interesting back then!
Haha i used to do this with hollow plastic dowels and sharpened stainless 1/4-20 rods. Would go through 1/2" plywood. The fun parts of workin in a metal shop.
A straw in a tornado doesn't have to push through air resistance the way your ones did, in the tube/gun-barrel on the way to the target. More of an impact maybe.
A variable missing in your tests that I am curious about is pure wind shear possibly opening the pores of the skin of the foods. It would seem that those winds, not being isolated to the straw but also pounding on the surface of the objects might make them more prone to being punctured. What do you think?
good question, I've also wondered about the blast of wind versus being in a steady stream of high winds. I would agree that the wind itself makes the food more susceptible to being punctured, it's adding more stress to the skin. the best example of this is the tomato, I think they were torn apart more by the wind than by getting hit with the straw
@@YeanyScience Hello, my sister sent me a link to a "science" video and there are two experiments in the video. The second one (about 10 min in) is actually very intriguing,. Their channel is more for pre-schoolers so they don't dig deep at all, plus they are hawing products a plenty in their vids. However, I know you rock at physics, but if you are good at chemistry too I would love to see your in depth explanation of what is really going on and why. I know there are issues a plenty with the molecular affinity and density too, but I want to know more, so I am coming to you with the request. The other thing I noticed is they show the milk being the slowest reactant, but I am not sure it is. I think the experiment should be done with a clear surface to monitor from the top and the bottom to verify what's really going on. Anyway, if you can and you want, here is the link. I appreciate your consideration and wisdom. th-cam.com/video/UJw33AKwyt8/w-d-xo.html
I think it's reasonable to think that wind speeds may actually be even higher in some circumstances, depending on the local topology of the environment. However, I still think the stories are pretty implausible. An assumption of your tests is that the long axis of the straw is exactly parallel to the direction of the wind, and that the surface of the pumpkin is not just perpendicular to it, but also stationary. I think these assumptions are incredibly unlikely to actually occur in a real life tornado. Make the angle of impact just a little oblique, and I really doubt you'd see straw actually go into the flesh of the fruit.
good points, although I did actually hear the story from a pretty good source. I would think given enough straw laying around there would be the chance that a few might make it into the fruit as described but my feeling is as the story was repeated the numbers were highly inflated.
I got a Samsung Galaxy S9 in Nov. and have had a blast with the slow motion. Super slow on it is 960 fps like you said so I was wondering if you used a phone like this to capture your slow motion ? Great video btw. : )
Thanks,I use the Sony RX 10 and the smaller RX100. both can shoot up to 960 fps. I especially like shooting at 120fps with sound. Love to find something reasonable for higher fps rates, there are some great higher priced ones but can't justify the price at the moment
Possible, because you won't really get every last wind measurement from a tornado, or whatever. I am saying an F-3 for example could possibly produce some higher winds at times and behave as an F-4 or 5 for a few seconds.
This is just a short burst of air, my brain hurts contemplating the actual physics behind tornadic winds blowing objects. If there is more constant wind behind an object, is it possible for the object to obtain a higher speed than the wind due to kinetic energy? I have so many questions. With air also moving all around the object at the same speed, I would imagine it also keeps the object from deflecting off of the object’s it collides with unlike what happened here with the straw done with artificially generated wind.
As a child living in Nebraska I've seen with my own eyes straw poking all of the way through a living tree branch, probably 5-inches in diameter. It was a hardwood tree--no evergreens grew there. I was six or seven at the time and remember it quite well. There was also a chicken coup wall with easily 200 straws embedded it it standing 10 or 15 feet away. The same farmer had a grain silo completely disappear sans the concrete pad. As far as I know they never found a single piece of that silo anywhere on their farm.
Interesting, you are the third person that asked about that piece today. It's one of my oldest pieces and I thought I had a posted it somewhere on it but I guess not. You can't tell with it sitting on the shelf because it is too tall but there are supposed to be two flags on the top of it. As I turn the big gear, both flags wave back and forth. Before showing it to students, I would have them go through the gear and lever movements to determine which flag would "wave" faster. Would you like me to make a video on it?
With the repeated onslaught that a tornado would provide, it's more than possible. The first couple hundred pieces of straw may not make it into the flesh, but they would have weakened the skin and by shear luck and numbers hit the right spot at the right time to do it. I say it's probable.
I use a Sony RX 10 for most of my video shots. I especially like to shot at 120 frames per second and capture sound at the same time. I can then slow then down 4 or 5 times and still have excellent quality. It also will shoot higher speed with no sound. 240, 480 and 960 for short bursts. I'd love to get something faster. I think there are several camera out now that will also shoot high speed under 480 FPS, even several phone now have the capability.
Hello teacher do you have instagram? Thanks for all your videos, now I can undertsand things that I had never understood until now. Maybe If I watched your videos when I was younger, I would studied something related with science. P.S You should open a patreon, I would love to watch more videos. I'm very motivated to learn new things so I can explain them to my daughter.
Hello Elizabeth, I'm sorry but I'm not on instagram, twitter, other social sites. I am happy to hear that you have found these videos useful. I have several more ideas that I plan to continue posting them.
I love my carpets in my garage, I've had them both a very long time. The green one does have a Turkish design, the other has very color busts reminding me of a Van Gogh painting. I'm not sure where either came from.
@@TheRadioAteMyTV from my understating, given a longer barrel, the air pressure has a longer amount of time to act on the projectile, and thus results in more acceleration. At least to a certain point
When I went through early grade-school in the early 1960s, we would often have a chance to buy books from Scholastic Book Services which still sells books to students. I mention the time period only to avoid the idea that Photoshop might have been used in a particular book that caught my eye: "Hurricanes and Tornadoes". It showed, among other things, post-tornado damage to trees, one of which had a drinking straw stuck in the actual wood.
More recently but less precisely in my memory was a video of the Mythbusters folks performing a few tests along similar lines.
Make what you will of the photo in the book, but the drinking straws of the day were paper, not yet plastic.
Ah, sounds like we were in grade school about the same time. I remember the scholastic books well but missed the one you mention. I hadn't heard about the drinking straw until posting this video, but it is one I look forward to trying, paper and plastic as well as some other items that might be fun..
I find it amazing that there aren't more injuries of this type during tornadoes and hurricanes.
It would be interesting to see if the straw could penetrate a soft wood, such as pine, using the CO2 fire extinguisher.
Another excellent demonstration!
Thanks Lake N, I'm sure I'll try some version of this again, that is one I want to try. I've had a few mention about straw stuck into trees and fenceposts. I'd be interested to see how far they go in
Nice to see you back Online Science Teacher!
It's great to see you again. You always make interesting, educational and fun videos.
Thanks Steve, just checked out your channel, nice
Never enjoyed seeing tomato and pumpking getting pierced so much!
Thanks, excellent as usual! I think the penetrating ability of the straw might depend a lot on the species, influencing the strength of the material, and possibly on the shape of the cut end, square or oblique. The moisture content could go either way, either improving the mass and resistance to shattering, or it might reduce the stiffness and cause it to bend on impact?
As a child we found a six-foot length of three-quarter-inch heating pipe, and decided to try it as a pea-shooter, with balls of clay. We were quite surprised to find that they could go about 200 feet, and I seem to remember timing them at just under 100mph. Mercifully we didn't have a fire extinguisher to play with, as I don't thing the glazing in the neighbourhood would have been safe!
good points about the straw. I had a feeling that if it were fresher, I would get better results, I plan to test again. Your old peashooter sounds impressive. One of the interesting things I had kids try was a lesson on impulse using a peashooter. I had them start with a longer tube and then progressively cut it shorter, while shooting it the same way. nicely showed the distance was determined by the length of time the force was applied in the tube
@@YeanyScience Yes I think the rate of acceleration is quite slow. Of course there comes a time when lung capacity becomes the limiting factor ... and for some reason I took up freediving as an adult! :-)
What a great way to experiment. I love the idea.
Added to the strength of a tornado, there could be a tunnel effect that could increase wind speed in a considerable way.
Certain flow conditions could add up to about +40% local speeds. Just as the air flow is increased around the leading edge of a wing.
Bruce honey; I wanted to make a fruit salad but can’t find the apples and cantaloupe, have you seen them?
yes dear, they are already chopped up out in the garage
Hell yeah. After a tornado went through Schoharie, NY back in 1989, I found an imprint of a fern plant that had been embedded in the asphalt road after the tornado had passed.
One potential limitation on the air compressor is the speed at which the valve is opened. Jörg Sprave, a German engineer and TH-camr who makes improvised weapons (sorry, "toys"), had a similar limitation when designing his pneumatic arrow launcher. That toy used a standard ball valve with hand lever for the release. Rather than making that a manual trigger in itself, he used rubber bands under extreme tension to pull it toward the open position, with a mechanical stop in place that was released by the primary trigger.
Now, in all fairness, I think the kind of ball valve he used is inherently slower than the valve on your compressor. In addition, he charged his toy up past 4,000 PSI (which I think might be enough to supercriticize* nitrogen, but I digress). At higher pressures, the slower valve becomes more of a relative hindrance. For the record (and I think it probably _is_ a record), his toy managed to put one kilojoule of energy into his projectile.
* Now I'm just messing around.
I think the simplest solution for the gas gun would be to increase the length of the barrel, so that there is more time to build up pressure before the projectile emerges from the end. But according to the gas gun experts, another limitation is the build-up of air in front of the projectile, which is why they use an evacuated tube with a light cap that the projectile knocks away. (They also use hydrogen as the propellant, because its maximum limiting velocity is higher than air.)
@@anotherfreediver3639 good insight. I agree that a longer barrel length is far more practical, especially if the volume of the barrel is still negligible compared to the capacity of the compressor.
I have read descriptions of straws being driven through wooden floorboards in an article written in the early 1960s. So not only plausible but extremely likely to happen. Tornado windspeeds are externally measured as an average using doppler radar. Locally within the core of a tornado windspeeds can be considerably higher than at the wall where most external measurements are made. Apparently fragile objects moving at speed can develop great penetrating power as some brief calculations using kinetic energy equations will show.
HI Michael, I was very impressed with the results of my first tests and plan to try some more "targets". The ability of the fragile straw able to do damage reminds me of the paper saw blade that I did a video on a couple years ago. As fragile as paper is, turning at 15,000 RPMs it could easily cut through several materials much harder than the paper
Bruce Yeany
Thanks for the response. In addition to the kinetic energy contained in the straw, it is important to remember that the support structure is a cylinder which is essentially composed of silica and hence extremely rigid in compression. Revisiting the article mention earlier, I note that some straw stalks were driven through the metal casing of a domestic refrigerator. That really is a scary thought!
As always Bruce, you’re the man!! Thanks for keeping this nerdy 30+ year old entertained, and giving us fun experiments to share!
Yes. There are records of straw penetrating trees and telephone poles as well.
Would be interesting to see if there might be different kinds of straw available, or for alternative ideas, what might look like straw when embedded but be something else taken for a ride by the winds.
thanks James, I tried to use wheat straw in this case but you are right, I think there are several plants with more tougher stems out there. Wheat straw is hollow but there are several plants that have a solid core which would be more rigid.
I don't know why i laughed so hard when the straw got through the tomato and stuck in the pumpkin when he used the fire extinguisher
Congratulations, Mr. Yeany. Fascinating video, fascinating channel.
After that video in Germany plastic straws were banned because they are deadly weapons... ☝️
Nice demonstration!
What surprised me how stable they are around the longitudinal axis and they did not break!
Nice demo. I assume a tornado (as does any wind) will have smaller areas of even faster winds when air is reflected and/or channeled around various terrain and objects (hills, trees, buildings, etc.). It probably also depends heavily on how smooth and pointy the straw is. Some pieces seem to splinter more than others.
This is a very interesting channel...thanks for making science so interesting to us
Amazing teacher you are Bruce ❤️💙
Ok Bruce, quick question for you. Why does paper become transparent when it gets wet, especially when whetted with oil?
Best,
Johny from the UK
Hi Johny, good question, sorry but I don't have a good answer. I will check around and see if I can find out, or perhaps someone else will take provide it. anyone. know?
"Paper is opaque because there are mineral fillers in between the cellulose fibers, which are in a crystalline form. When surrounded by air, they appear opaque due to the higher difference in the index of refraction between the two. When wet, the paper appears translucent because there is a lower difference in the index of refraction between the crystals and the water, making it translucent." -> physics.stackexchange.com/questions/137628/why-is-wet-paper-transparent
Thanks Bruce! Your videos are great and they make physics really accessable and fun!
Came fro Noghthawk, nice channel!
Very good video as always. 🤗
Myth busters used a long, long tube to fire straw into and maybe threw a palm tree trunk.
- I wonder if using a long long tube that's not larger than your blowing capacity, would it be more effective? (Would also be neat to show a representation to show the lung capacity of a human maybe a cylinder with a float or piston to make how much volume, even flow rate with using frames per second math) or if it would create too much drag on the air trying to flow threw the pipe?
- Also maybe demonstrate a Stirling pump I think its called, to show how a fluid/air/water drag and friction can be used for work, as a pump or turbine (maybe a holy tube with cd's glued to it.
If use the clear discs it might be a good demonstration on how the centrifical / centrifugal forces act on the fluids.
Might need to power it with the drill to get it fast enough (as a water pump.
And can demonstrate just pushing a fluid threw it would drive the shaft "to make work".
- And... how steam can be made with a cavitation water heater, as the holes create cavitations and ultrasonic bubbles that are like tiny implosion's, creating small vacuum implosions possibly plasma, evaporating parts of the metal surface of the rotating drum slowly away.
Well they are just ideas... the last one is probably not easily done on low to no budget. 🤔😣
Pumpkin and squash in the field would still be attached to the plant with MUCH softer skins. The removal causes the fruit to cure and the skin hardens. I think you need to try this on plants with the fruit still on them. I believe the farmers.
Hahaha - I hope my retirement is even just a tenth as fun as yours!
I remember a photo, in a very old book, depicting a straw going into a tree bark, due to the forces of tornados...
I'm going to try this again this fall, I want to see its I can repeat that
Good think you pulled in the compressed air, coz I was just experimenting with balloon pump with removed valve and added a tube as barrel and was able to put a bamboo skewer through a roll of paper towel just using my hand to apply pressure force to the piston as quick as a I could.
I've seen photos of tornado driven straw poking out of telephone poles. Impressive.
In 1988 New Zealand and other Pacific Islands got hit by a once in a century Cyclone, Cyclone Bola.
Now, these are not CONCENTRATED storms like we see touch down, in the USA, where the sky sprouts a black finger and write "inescapable death" along a twisting track . . . ( honestly, why do you guys not get on a plane and move to Canada ? ) but paradoxically they do more overall damage because their energy is spread over a huge front.
And the week before the cyclone my dad had brought, and stacked up in his scrapyard, an entire factory-skin of 6 foot sections of scrap corrugated iron. About a thousand sheets.
Which simply vanished into the sky.
We never heard of any pumpkins getting dissected, OR in fact of the sheets touching down ANYWHERE. They seemed simply to have "gone".
wish my school have a teacher like you 😍😢
Brilliant as always!
"It's not THAT the Wind is blowin' 150mph…it's WHAT the wind's blowin'. If you get hit by a Volvo, it doesn't matter how many sit-ups you did that mornin'." - Ron White
No vegetables were harmed in the making of this video.
Oh yes they were!
I'm skeptical about how the straw would've flown like an arrow in the tornado. It seems like it would blow around aimlessly.
On this note; were the pumpkins in the field immature? This would explain as to why the straw imbedded itself.
Softer skin=easier for hard straw to decimate- much like the tomato.
The tornado came through in July, so it was a bit early for it to be pumpkins. My impression that there were cantaloupes and melons in the field and and few other types of vegetables around but it was unclear what they were or how ripe they were
In one kids' encyclopaedia back in the 1950s it was stated that while it would be impossible to push a candle through a wooden door, the same candle fired from a shotgun would go through the door, no problem, so guess a similar principle applies. Not suggesting anyone should try a practical demonstration but think the kids' books were much more interesting back then!
Haha i used to do this with hollow plastic dowels and sharpened stainless 1/4-20 rods. Would go through 1/2" plywood. The fun parts of workin in a metal shop.
Love it! Great video, Mr. Yeany!
thanks Craig, I enjoy shooing stuff as I see you do too! Love your channel
A straw in a tornado doesn't have to push through air resistance the way your ones did, in the tube/gun-barrel on the way to the target. More of an impact maybe.
A variable missing in your tests that I am curious about is pure wind shear possibly opening the pores of the skin of the foods. It would seem that those winds, not being isolated to the straw but also pounding on the surface of the objects might make them more prone to being punctured. What do you think?
good question, I've also wondered about the blast of wind versus being in a steady stream of high winds. I would agree that the wind itself makes the food more susceptible to being punctured, it's adding more stress to the skin. the best example of this is the tomato, I think they were torn apart more by the wind than by getting hit with the straw
@@YeanyScience Hello, my sister sent me a link to a "science" video and there are two experiments in the video. The second one (about 10 min in) is actually very intriguing,. Their channel is more for pre-schoolers so they don't dig deep at all, plus they are hawing products a plenty in their vids. However, I know you rock at physics, but if you are good at chemistry too I would love to see your in depth explanation of what is really going on and why. I know there are issues a plenty with the molecular affinity and density too, but I want to know more, so I am coming to you with the request. The other thing I noticed is they show the milk being the slowest reactant, but I am not sure it is. I think the experiment should be done with a clear surface to monitor from the top and the bottom to verify what's really going on. Anyway, if you can and you want, here is the link. I appreciate your consideration and wisdom. th-cam.com/video/UJw33AKwyt8/w-d-xo.html
I think it's reasonable to think that wind speeds may actually be even higher in some circumstances, depending on the local topology of the environment.
However, I still think the stories are pretty implausible. An assumption of your tests is that the long axis of the straw is exactly parallel to the direction of the wind, and that the surface of the pumpkin is not just perpendicular to it, but also stationary. I think these assumptions are incredibly unlikely to actually occur in a real life tornado. Make the angle of impact just a little oblique, and I really doubt you'd see straw actually go into the flesh of the fruit.
good points, although I did actually hear the story from a pretty good source. I would think given enough straw laying around there would be the chance that a few might make it into the fruit as described but my feeling is as the story was repeated the numbers were highly inflated.
Nice
I got a Samsung Galaxy S9 in Nov. and have had a blast with the slow motion. Super slow on it is 960 fps like you said so I was wondering if you used a phone like this to capture your slow motion ? Great video btw. : )
Thanks,I use the Sony RX 10 and the smaller RX100. both can shoot up to 960 fps. I especially like shooting at 120fps with sound. Love to find something reasonable for higher fps rates, there are some great higher priced ones but can't justify the price at the moment
Possible, because you won't really get every last wind measurement from a tornado, or whatever. I am saying an F-3 for example could possibly produce some higher winds at times and behave as an F-4 or 5 for a few seconds.
There are stories telling that straws were found stuck in concrete. Do you think it’s possible ? Thanks Bruce 🙂👍
Just like mithbusters!! Just thank you!
More like Mythbusters, actually.
@@SteveFrenchWoodNStuff yes yes he made a typo, get over yourself
First time I saw somebody clamping down a tomato to a table.
This is awesome. Good job me Yeany.
Microwave
Get enough pieces of straw flying around and some are going to hit soft spots just right so the straw doesn't fly apart.
Vegans will report this video due to its cruelty towards vegetables. :o)
Happy new year, Bruce. See you in 2020!
So true!
This is just a short burst of air, my brain hurts contemplating the actual physics behind tornadic winds blowing objects. If there is more constant wind behind an object, is it possible for the object to obtain a higher speed than the wind due to kinetic energy? I have so many questions. With air also moving all around the object at the same speed, I would imagine it also keeps the object from deflecting off of the object’s it collides with unlike what happened here with the straw done with artificially generated wind.
This reminds me of the trick in which one can drive a paper or plastic straw into a potato.
The version of this story that I've heard is straw piercing trees. Maybe balsa trees!
As a child living in Nebraska I've seen with my own eyes straw poking all of the way through a living tree branch, probably 5-inches in diameter. It was a hardwood tree--no evergreens grew there. I was six or seven at the time and remember it quite well. There was also a chicken coup wall with easily 200 straws embedded it it standing 10 or 15 feet away. The same farmer had a grain silo completely disappear sans the concrete pad. As far as I know they never found a single piece of that silo anywhere on their farm.
Great video! On the top shelf, you have a brown object with various circles and possibly levers. What is that contraption?
Interesting, you are the third person that asked about that piece today. It's one of my oldest pieces and I thought I had a posted it somewhere on it but I guess not. You can't tell with it sitting on the shelf because it is too tall but there are supposed to be two flags on the top of it. As I turn the big gear, both flags wave back and forth. Before showing it to students, I would have them go through the gear and lever movements to determine which flag would "wave" faster. Would you like me to make a video on it?
What happens if you shoot with the high-speed-bullet to a person?
Hi there I've seen photos of vinyl records in telegraph posts so enithing is possible
love u sir
With the repeated onslaught that a tornado would provide, it's more than possible. The first couple hundred pieces of straw may not make it into the flesh, but they would have weakened the skin and by shear luck and numbers hit the right spot at the right time to do it. I say it's probable.
Sounds a lot like how humans are made too.
cool science but I hope those fruits someone gonna eat them
it didn't go to waste,
@@YeanyScience That is good news.
@Ingtegza you should see this tomato carnage XD
Imagine getting hit by that thing during a storm
put wooden scewers as projectiles
May I ask about the high speed camera model you used?
I use a Sony RX 10 for most of my video shots. I especially like to shot at 120 frames per second and capture sound at the same time. I can then slow then down 4 or 5 times and still have excellent quality. It also will shoot higher speed with no sound. 240, 480 and 960 for short bursts. I'd love to get something faster. I think there are several camera out now that will also shoot high speed under 480 FPS, even several phone now have the capability.
@@YeanyScience Thank you for your response.
Hello teacher do you have instagram? Thanks for all your videos, now I can undertsand things that I had never understood until now. Maybe If I watched your videos when I was younger, I would studied something related with science. P.S You should open a patreon, I would love to watch more videos. I'm very motivated to learn new things so I can explain them to my daughter.
Hello Elizabeth, I'm sorry but I'm not on instagram, twitter, other social sites. I am happy to hear that you have found these videos useful. I have several more ideas that I plan to continue posting them.
If 365 can imbed a yam then 260 could probably imbed a pumpkin.
Is that a Turkish carpet on the ground?
I love my carpets in my garage, I've had them both a very long time. The green one does have a Turkish design, the other has very color busts reminding me of a Van Gogh painting. I'm not sure where either came from.
If you take an entire field I doubt he embellished any... he had a lot more experiments
pumpkins? try fenceposts. not embellished
I wonder if you could get a faster speed from your 90 psi air compressor just by making. Longer barrel
Why would distance effect speed? Wouldn't it degrade regardless past the point of thrust?
@@TheRadioAteMyTV from my understating, given a longer barrel, the air pressure has a longer amount of time to act on the projectile, and thus results in more acceleration. At least to a certain point
@@SGManiac1255 Interesting. I would like to learn more about that.
kevin mccallister liked this video.
these poor fruits and vegetables...
cool
Coconut
100% happened
Now let's see a backside!
Poor tomato looking like JFK :|
Mythbusters
Try plywood.
First
you could try trump's head next time :-P