I use a foot-long piece of 2X4, so the bottle remains totally unsealed. That's for all the people who insist that it won't work unless filled all the way to the top, so your hand will compress the water.
From a fluid dynamics perspective: It seems to me that hitting the top of the bottle sends a shockwave through the water. Shockwaves have extremely low pressure at the front of the shock and extremely high pressure at the back of the shock. When the front of the wave reaches the bottom of the bottle, that low pressure zone generated by the shockwave induces cavitation (the little pocket of vapor you see at the bottom of the bottle). The water cant hold onto the air bubbles that are already dissolved in it or stay in its liquid phase in this low pressure zone, similar to why boiling water is much easier at the top of a mountain; the atmospheric pressure is less. When the energy of the shockwave dissipates, this vapor bubble (cavitation) collapses...very, very, violently. Often times at supersonic speeds. The force of that vapor bubble collapsing at supersonic speeds (which brings the water crashing down onto the bottom of the bottle), is what breaks the bottle, in my opinion. Perhaps Schlieren imaging could confirm this. It would follow that the CO2 bubbles in carbonation interrupt this shock wave from passing through the liquid, and keep the wave from reaching the bottom with enough energy to induce cavitation. The low pressure zone generated by the shockwave would cause the CO2 bubbles to escape from the liquid, causing the foaming in the beer you see This phenomenon is very similar to the cavitation seen in boat propellers. The propeller spins through the water, generating a low pressure zone behind the blades of the propeller, and when this pressure is low enough, the water can no longer stay in it's liquid phase, releasing any dissolved gas and changing phase to water vapor, generating the vapor bubble you see behind the propeller. When the energy from the propeller dissipates, these vapor bubbles collapse at supersonic speeds, changing the phase back to liquid and dissolving any air/gases back into the water, but at the same time gouging a chunk of metal out of the propeller. Edit: I've edited this post to clarify a few things, thanks to those who commented below!
@@mrosskne I watched the full video. My thought is that the source of that impact is not from the water trying to catch up to the bottle, but from the collapse of the vapor cavity induced by the low pressure region near the shockwave.
@@c82153 actually its steam not air, your lowering the atmospheric pressure, causing the water to boil, so its not air its actually steam, same with cavitation on boat propeller, its not bubbles of air but steam, the water is actually boiling there is no air being released, if air was present in the water it would stop the cavitation from breaking the glass, that is why it has to be a water with no dissolved gases in it, when you lower the pressure of water, it boils giving off steam, not air, and the cavitation is the source of the glass breakage
I learned to do this forty plus years ago, while in college. I always did this the hard way, with coke bottles having thicker glass. Plus seeing why this works would have led to better results.
3:24 In hindsight, this should be ruled out immediately. These bottles are designed to be able to handle three atmospheres of internal pressure (carbonation is usually three atmospheres above atmospheric), so they would of course have no problem handling one atmosphere of external pressure.
The Mormons I knew growing up were the most creative at cussing. Hundreds of different, often far worse than the curses they were replacing, gross and shocking replacement words. Just super creative mouth-farters.
We do that with beers at parties. Not to break glasses, but to see people panicking, putting the bottle in their mouth trying to deal with the foam. Quite funny.
I’ve watched this 3 times and UA-cam just suggested it again so looks like I’m watching it for a 4th. I feel so much smarter and happier after just watching Mark’s videos
Yes! Glad you did this! I, too, thought it was the air pressure forcing the liquid down. I was taught in my teens (in the 80's) by a friend to use wine bottles! No wonder they worked so well being non-carbonated. Thankfully, only about 3 out of 50 have broken in my hand while attempting this.
On the foaming of beer, I did a research project in chemistry at uni with my professor. And we found that not only do you find that bubbles are made, and then increased because of a chain reaction, but this happens more so in beer than any other drink! And that's because that beer is just crazy good at foaming because the bubbles are more stable, mostly due to the fact that the pH is higher in beer than cider, soft drink, and other carbonated drinks. The more you know!
Theory #2 is the physics of a mean practical joke. When someone motions to "clink" your bottles together, instead of "clinking" the necks together, slam your bottle on top of their bottle and watch their beer spill on the floor lol
Its a type of a inplosion, and its called cavitation, because of the vacum, steams bubles are formed and when they contract back to liquid they create a hard punch and cause high material tension on a small surface so that causes the glass to brake.
It's a major issue in propeller design, both for Ships and Subs. Reducing it in subs was more important due to the identifiable sound it produced when other vessels were listening with a hydrophone.
Yep. It's the Water-Hammer effect. The water and bottle are pulled together by the vacuum created from the initial strike. The water and bottle come together rapidly, and since water is in not compressible and has high mass, it's like hitting the glass with dense solid object and the glass shatters.
I did this over 10 years ago in my martial arts class. :) I always thought it was due to the air pressure being forced into the bottle and having nowhere to go. Interesting that the real answer was something completely different!
Look at his bio. He went to BYU for a while. Unless he's Jim McMahon, he a Mormon. (He also filmed some of the Pinewood Derby car video, in a Mormon church. I'm guessing a Stake Center, since the cultural hall has wood floors.) steve
Two things this video impress me is that 1. They came up really easy way to test their theory. 2. The slow-mo technology makes it so easy to prove the second theory. That's such a amazing combination of big brains and technology.
I have been watching your videos since the Halloween phone t-shirts (I bought one) it's awesome. Thank you so much for what you are doing, Keep up the good work bro 😉
There's another theory - a shock wave moves equally and radially down the glass bottle and crashes into itself when it converges at the bottom of the bottle directly opposite of where it was struck. You can see this effect in a video where a guy shoots a glass globe with a gun. The bullet penetrates one side but does not break the globe and on the exact opposite side the glass breaks as if it were shot on that side as well. This is from the convergence of the shock waves on the opposite side.
Slow motion cameras make experiments such as these soooo much more fun and you can actually get to the bottom of why it happens. Wonder if my iPhone slowmo will also show it? 😂
would it be possible to increase the scale of this and maybe 'harvest' that downward momentum of the water? Because he basically said, that the water collapsing into the vacuum causes a greater force than what was put in.
Point 3 is wrong, if you have a higher vapour pressure liquid, it will fill more easily the bottom with gas (similar to what happens with the beer). You actually need the opposite, so there is nothing in between the liquid and the bottom when they meet again, this will maximize the impact velocity.
Just wondering, what is the difference between doing this and simply shaking the bottle? Is it the added force of hitting the top of the bottle that creates the vacuum, not possible by simply shaking it?
It's the effect of moving the bottle down faster than the liquid can be brought with it, hence him saying you might even want to wet your hand so the bottle moves more. If you shake something, the air may become trapped in the liquid, such in the form of bubbles. He noted it doesn't work with carbonated drinks as the bubbles will fill that vacuum, not causing the same violent reaction of the vacuum being filled 10x faster. Shaking doesn't create a vacuum anywhere, it would just move the air around the bottle as well as the liquid.
Air don't need to be entered at the top cause hitting the top with force builds the pressure in cause a bottle isn't air tight anyways with a lid on. The bottle has some air init before opened, but the rubber hammer or the Parm of your hand must play a part init to stop the air escaping out the top once hit so the only way is down My theory would be try hitting the hammer on the top without creating a seal, only hit the rim or the edge with all the same procedures as you did Or try diffrent bottles or wider bottle necks with also my theory 🙂
Rubber mallet is a good idea. I can't tell you how many times I hurt my hand trying this.
Hey Grant, sad nobody has acknowledged your comment... Anyhow keep up the good work!
Hi Grant
👍
I use a foot-long piece of 2X4, so the bottle remains totally unsealed. That's for all the people who insist that it won't work unless filled all the way to the top, so your hand will compress the water.
Ouch.
You two guys are definitely Phineas and Ferb
ferb*
Kevin, I know what we're doing today!
*THERES A HUNDRED AND FOUR DAY OF SUMMER VACATION*
My childhood :(
Zomhunter 3455 only 19 more days
When they both had different theories I was like oh no it’s like the two smart kids in class getting different answers
It never ends well
When you anser option A, but the actual answers are either B or C
And then the one that was wrong fights the one the was right after class but there both weak so it ends in a chess game
i ones was the smart one in that
I agree
This never gets old watching it again.
ikr
I knoe
yep
ong
Ye
Literally every time:
Mark Rober: High-Speed Projectiles!
Backyard Scientist: Set Everything on Fire!
FIRE
lol
Together : A High speed projectile while on Fire!
Brother
Jacob Lee flaming bullets
I totally think that Mark Rober, Backyard Scientist and the Slow-Mo guys need to make some of these videos together
bit of william osman chucked in there for good measure
Tkor too!
The world needs this.
micheal reeves !1!1!
Get all of the UA-cam science people together in one video
*ENDS UP GOING TO MARS*
Tried it at home.
Broke all the beer bottles in my fridge.
Now dad is beating me.
Thank you. *very* much...
Oh no
It didn't work
At least you stopped him from drinking
Oh... oh no
Zer0 Deaths sad
Me after watching this video: “excuse me, friend, can I interest you in this delicious bottle of hot water?”
Imagine pulling out some kerosene snowballs during a snowball fight
😂😆🤣
sounds like them
Finland has now ideas
Anti-Molotov inbound!
Uncle Jerry got PTSD back to 'nom
5:22
Who the hell screams ”gonnorhea” when they hurt themselves
😂
He does
Pretty sure his religion stopped him from swearing. He’s mormon I think
@@KobeKeats yikes, maybe one day he will fix that
Ghost Lul should’ve worded it differently
5:12 "this is glass"
jerryrig : "glass is glass and glass can break"
Jerry rigs a bottle
@@CheseBitez well can you make him human again?
From a fluid dynamics perspective:
It seems to me that hitting the top of the bottle sends a shockwave through the water. Shockwaves have extremely low pressure at the front of the shock and extremely high pressure at the back of the shock. When the front of the wave reaches the bottom of the bottle, that low pressure zone generated by the shockwave induces cavitation (the little pocket of vapor you see at the bottom of the bottle). The water cant hold onto the air bubbles that are already dissolved in it or stay in its liquid phase in this low pressure zone, similar to why boiling water is much easier at the top of a mountain; the atmospheric pressure is less. When the energy of the shockwave dissipates, this vapor bubble (cavitation) collapses...very, very, violently. Often times at supersonic speeds. The force of that vapor bubble collapsing at supersonic speeds (which brings the water crashing down onto the bottom of the bottle), is what breaks the bottle, in my opinion. Perhaps Schlieren imaging could confirm this.
It would follow that the CO2 bubbles in carbonation interrupt this shock wave from passing through the liquid, and keep the wave from reaching the bottom with enough energy to induce cavitation. The low pressure zone generated by the shockwave would cause the CO2 bubbles to escape from the liquid, causing the foaming in the beer you see
This phenomenon is very similar to the cavitation seen in boat propellers. The propeller spins through the water, generating a low pressure zone behind the blades of the propeller, and when this pressure is low enough, the water can no longer stay in it's liquid phase, releasing any dissolved gas and changing phase to water vapor, generating the vapor bubble you see behind the propeller. When the energy from the propeller dissipates, these vapor bubbles collapse at supersonic speeds, changing the phase back to liquid and dissolving any air/gases back into the water, but at the same time gouging a chunk of metal out of the propeller.
Edit: I've edited this post to clarify a few things, thanks to those who commented below!
missed the part in the video where they showed the impact from the water shattering the bottle?
@@mrosskne I watched the full video. My thought is that the source of that impact is not from the water trying to catch up to the bottle, but from the collapse of the vapor cavity induced by the low pressure region near the shockwave.
@@c82153 alright, congrats on being blind i guess
@@mrosskne this may surprise you, but physically seeing a phenomenon doesn't always reveal the correct explanation.
@@c82153 actually its steam not air, your lowering the atmospheric pressure, causing the water to boil, so its not air its actually steam, same with cavitation on boat propeller, its not bubbles of air but steam, the water is actually boiling there is no air being released, if air was present in the water it would stop the cavitation from breaking the glass, that is why it has to be a water with no dissolved gases in it, when you lower the pressure of water, it boils giving off steam, not air, and the cavitation is the source of the glass breakage
Me: It's definitely just air pressure
mark: It's not air pressure
Me: It's not air pressure
Lol
did that bottle at 1:50 say corona
@@macul76 yeah, isn't there a beer brand called Corona
@@gabulhiboakibaa yes
Hahahaha
*The Slow-Mo Guys wants to know your location*
Mark Rober used the reverse card, therefore the video was recorded in the backyard
Bruh
Except the Slow Mo Guys did this 3 years before this video was created.
Want* not wants
AdrianMaster wAnT nOt WaNtS
*SET IT ON FIRE*
-Kevin (The Backyard Scientist) 2016
I learned to do this forty plus years ago, while in college. I always did this the hard way, with coke bottles having thicker glass. Plus seeing why this works would have led to better results.
3:55 Says they put red colour in The bottle to see The break easier.. shows clip of a bottle with a clear liquid
It's red
Trackster I’m pretty sure it is red, I believe it has to do with the red effect.
Either I am color blind but I see no red at all it is just clear
its not the same bottle
PolaroidFreak 600 oh yeah
"I'm pretty bored today so I'm gonna smash bottles."
youtube in a nutshell
how to mine glass in minecraft 2:53
This is the most underrated comment ever
Minigod95 not really
Minigod95 wrong
Underrated
Sunny Uy Get out of UA-cam
3:24 In hindsight, this should be ruled out immediately. These bottles are designed to be able to handle three atmospheres of internal pressure (carbonation is usually three atmospheres above atmospheric), so they would of course have no problem handling one atmosphere of external pressure.
"You should set those on fire"
Yes throwing fire balls at kids will be fun
🤣
It would though 💀
Especially during summer
Goodness gracious great balls of fire
Mario
2:52 Aww whos a good bottle? Pat pat*
No I'm not! *smashes*
Yes you are
I loved that part
Wow how did you notice that?
Shrek
I love it when he shouts in pain Gonorrhea 5:22
That’s what I thought I herd.
David Baranski I thought he said diarrhoea lol
The Mormons I knew growing up were the most creative at cussing. Hundreds of different, often far worse than the curses they were replacing, gross and shocking replacement words. Just super creative mouth-farters.
@@janelle6697 took me a long time to figure it out as well
666 likes
4:03 the moment when you are absolutely, and the absolute joy, these slomo cams brought a new dimension to science
Funny how he uses a corona bottle for the water
James Storie lol
ik right
Lmfao
*+virus*
Lmfao
5:23 I'm not convinced Mark didn't say "Gonorrhea" in a pained voice
He does
Keep replying
@@Jeff-qz7rx ok
5:22
nope .. he said "Diarrhoea" LOL
5. Don’t chicken out:
Shows mark hitting his hand and then mumbling ‘gonorrhoea!’.
Nice
OWWWWW!!!
*AAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHH*
😂
O
Ok
"So as firm believers of science..." when you hear that
@@MarblesSC stop please
@Marbles BS who cares he doesn’t have to get it perfect
@@MarblesSC I could care less if he is a boy or a girl
@@MarblesSC don’t care, didn’t ask
@@MarblesSC Don't start your sentences off with "because".
I am using this for my science project thanks and I’ll put you as my source of information
Beogoe so how did you do on your science project
BEST science channel on UA-cam, I wish he would post more often
Well, this and SmarterEveryDay
Same here, oh and I already knew what happened before watching
Also I'm in 5th grade
*****
Yay! Do I smell a collab?
also vsauce and hansentertainment
Me 2
did he say gonorrhea when he hit his hand on the bottle xD 5:21
Yes😂😂XD
lololol
I literally thought the same thing
Nailed it
He said "god that really hurt"
We do that with beers at parties. Not to break glasses, but to see people panicking, putting the bottle in their mouth trying to deal with the foam. Quite funny.
I wish he was my science teacher because he would be so fun
Jada Penny my science teacher got me a detention for laughing
BLE shadow U.S Gaming BE Xd
Mars Forest
You are so true lol
Yeah
He is Obviously the Fun Uncle
Of course
Sub to me I will sub back
+Canyouhelp Withnovideosmereachasubscribers DONE
+RANDOMBROS MZM I subbed back
So... he's a funcle ?
Mark Rober: has a corona beer in his hand
*intense breathing*
Good I wasn’t the *ONLY* one thinking of that
Not intence breathing, no breathing
i went to read the comments to see if any one talked about that, lol
@@noelward7491 yeah no breathing.
*JUST A COUGH*
I’ve watched this 3 times and UA-cam just suggested it again so looks like I’m watching it for a 4th. I feel so much smarter and happier after just watching Mark’s videos
I’m glad you used Corona bottles😂 fitting for this time
Sabulous Fabulous huh how did he know? 🤔
Sabulous Fabulous NO
John Hursey do, you not understand ?
Corona is a Alcoholic beverage
THE_WATER_WIZARD But I’m talking about the virus
John Hursey oh,
0:28 Nowadays seems like Corona is takin its revenge, ain't it?
It's marks fault
Im next????
@@FireshotAJ probably
@@gufostanco220 ok
@@FireshotAJ ready?
I love how he’s talking about ready player one before the movie came out
It was a book first
@@bakerbrooksjr5102 Hello there mr obvious!
I still need to watch RPO Iol
@@despacitospider7590 Same
General kenobi
I skipped the first part so all I heard was
“you should set those on fire”
But I only saw the kids so i was like
“Set ThE kiDS oN FiRE?”
0:00
Those trees behind him looked like wings ._.
Ya😆😂😹⊙.☉ ⊙.☉
Yeah 😂
Kid: *Throws snowball at another kid*
The other kid: AAHH IM ON FIREEE
Parents: ...
Mark: AHH WRONG SNOWBALLS
Cringe
" just to be more consistent"
*also cause I'm a wuss
I was dying 😂😂 brush I would too
Brush?
@@taylang6101 ikr 😂😛
Yes! Glad you did this! I, too, thought it was the air pressure forcing the liquid down. I was taught in my teens (in the 80's) by a friend to use wine bottles! No wonder they worked so well being non-carbonated. Thankfully, only about 3 out of 50 have broken in my hand while attempting this.
0:34
Mark: "...so either Kevin has some superpowers..."
Kevin: *nods*
On the foaming of beer, I did a research project in chemistry at uni with my professor. And we found that not only do you find that bubbles are made, and then increased
because of a chain reaction, but this happens more so in beer than any
other drink! And that's because that beer is just crazy good at foaming because the bubbles are more stable, mostly due to the fact that the pH is higher in beer than cider, soft drink, and other carbonated drinks. The more you know!
Long commet
05:24
That gave me the greatest nostalgia feeling I've ever had :3 So unexpected I wasn't prepared :o
Mein-Kanal-Hat-Einen-Viel-Zu-Langen-Namen me too
Theory #2 is the physics of a mean practical joke. When someone motions to "clink" your bottles together, instead of "clinking" the necks together, slam your bottle on top of their bottle and watch their beer spill on the floor lol
I knee a guy in college that did that with his cheap wine bottle! Worked great on a full beer, but half empty was just a little foam
Sounds fun outdoors, but if you did that indoors at my place, the next practical joke would be me handing you a mop :p
Mark literally u are the best you tuber on UA-cam keep up the good work
Ikr no UA-camr I've seen puts this much effort and creativity into their videos
If you guys like this kind of video, you should check "smarter every day". His videos are really awesome
+Mateus Hokari but mark is an overall nicer guy
Its a type of a inplosion, and its called cavitation, because of the vacum, steams bubles are formed and when they contract back to liquid they create a hard punch and cause high material tension on a small surface so that causes the glass to brake.
Exactly, I was looking for this explanation, sadly I don't think he mentioned it.
Break*
I've also heard it called water hammer.
It's a major issue in propeller design, both for Ships and Subs. Reducing it in subs was more important due to the identifiable sound it produced when other vessels were listening with a hydrophone.
Me: Should I subscribe?
Mark: 5:54
Me: ok
Alright ima invite my friends over and give them a beer bottle with hot water it nail polish remover and hit the bottle. What kind of day is that
Oh my god! Ready player one is my favourite book ever!
Same here.
Juicemoose24 i second that
2:52 my computer trying to open 2 CHROME TABS...
hahahaha
2:53*
underrated comment
lolll
That book seemed
Interesting.. You're actually making me debate if I should get the audible trial or not.. 🤔
Yep. It's the Water-Hammer effect. The water and bottle are pulled together by the vacuum created from the initial strike. The water and bottle come together rapidly, and since water is in not compressible and has high mass, it's like hitting the glass with dense solid object and the glass shatters.
Nobody:
Not a single soul:
Kevin: *YOU SHOULD SET THEM ON FIRE*
DogeMLG!!! 2906...... I’m starting to think Kevin is an evil genius..... I’m gonna go do this.....
5:21 did he say “gonorrhea.”
I believe so. I heard the same thing and checked the comments to see if it was just me lol
5:23
test comment
Omg lol
I did this over 10 years ago in my martial arts class. :)
I always thought it was due to the air pressure being forced into the bottle and having nowhere to go.
Interesting that the real answer was something completely different!
Mark: so either Kevin has superpowers-
Kevin: *shakes head*
Copied
I didn’t copy it I might have seen a comment like this and forgot then made it but i’m not about copying others.
that slow mo with the red bottle is so satisfying to hear
Who wants to see more flaming snowballs
kevin the backyard scientist has a video on it
How much beer did you drink during this
None it all went to the ground
As much as a pizza box does
He said at the beginning that he doesn't drink
They gave it to the doge
Look at his bio. He went to BYU for a while.
Unless he's Jim McMahon, he a Mormon.
(He also filmed some of the Pinewood Derby
car video, in a Mormon church. I'm guessing
a Stake Center, since the cultural hall has wood
floors.)
steve
The fact that they have the "Corona Extra" Beer makes this even better xD
Woo!!!! Another video!! :D
I love you videos
I love your videos, but I wish there were more :/
No crap
“You should set those on fire”
>snowballs
2:13
At any party, if you tap a bottle on top of another, you're a god for that prank
Two things this video impress me is that
1. They came up really easy way to test their theory.
2. The slow-mo technology makes it so easy to prove the second theory.
That's such a amazing combination of big brains and technology.
2019 And that movie has been made.
I have been watching your videos since the Halloween phone t-shirts (I bought one) it's awesome. Thank you so much for what you are doing, Keep up the good work bro 😉
You're definitely a nerd, a very cool nerd. I love every video and enjoy your explanations of science. Wishing you well and much success.
Mark Rober, scientific expert, "Round three! FIGHT!"
Where my 1 min squad at??
Here
Here
Crap, I'm late.
+Mark Rober omg I literally think ur amazing
I’m here
Just made some smoothie while watching this, hope you have a nice day. :)
enjoy
thanks! you to!
This channel gives me A+ at my science and chemistry tests than My teachers vids XD
There's another theory - a shock wave moves equally and radially down the glass bottle and crashes into itself when it converges at the bottom of the bottle directly opposite of where it was struck. You can see this effect in a video where a guy shoots a glass globe with a gun. The bullet penetrates one side but does not break the globe and on the exact opposite side the glass breaks as if it were shot on that side as well. This is from the convergence of the shock waves on the opposite side.
Why is Kevin so obsessed with making a fireball? XD
the *first* bottle they busted was a bottle of *corona* well, we got a lot coming, I can feel it
Lol
Busted corana out lol
yes, BREAK CORONA
AND THATS HOW CORONA *BUSTED* OUT INTO THE WORLD
@@The_SiIIy_0ne hello from the future!
Who's watching corona bottle breaking in corona quarantine..
Thank you for bringing me here Steve
I saw this from the slow Mo guys and it creates a vacum
Bro just smacked corona
Good job...
Now you have a bunch of glass shards in you back yard...
Where are you
Bruh stfu
Are you Jamaican?
Grrr
Why are these comments so random and one mean
Mark: if you want to impress your friends…
Next day: all your friends come with beer bottles filled with water
If I get 30 likes I will eat my gas stove 😂😂😂
Me: I need to escape from all this Corona virus news, Ah a Mark Rober video, this will do the job!
Mark Rober: *uses Corona bottles*
wow the bottle breaking also removed all of the red food coloring
Carter Mangum lol
lol
I love it how he explains it so easily
Facts
2:52 that is so satisfying
still trying to figure out if Mark said “gonnorhea” or “diarrhea” when the bottle didn’t break...and why...
Zach Brown gonnorhea
I think
The Man true
He should have said pneumoultramicroscopicsilicavolcanocanosis
2:53 I just made a gif out of that.
Slow motion cameras make experiments such as these soooo much more fun and you can actually get to the bottom of why it happens. Wonder if my iPhone slowmo will also show it? 😂
I see what you did there.
I love your videos! You do such a good job on them!
I want to know that trick would work if you use liquid nitrogen
would it be possible to increase the scale of this and maybe 'harvest' that downward momentum of the water? Because he basically said, that the water collapsing into the vacuum causes a greater force than what was put in.
Damn, there go my hopes and dreams of infinite energy...
Ztrex what
you guys should do more togerther
Ztrex kkkk
Point 3 is wrong, if you have a higher vapour pressure liquid, it will fill more easily the bottom with gas (similar to what happens with the beer). You actually need the opposite, so there is nothing in between the liquid and the bottom when they meet again, this will maximize the impact velocity.
my guess is cavitation bubbles
Asriel Meemur
No, cavitation, as in cavity. IIRC it's caused by low pressure waves in liquids that cause either a vacuum or gas to form.
Yes slow it down a lot, to 7k FPS
Slow mow guys: laughs in 1 trillion fps
Ah yes
Just wondering, what is the difference between doing this and simply shaking the bottle? Is it the added force of hitting the top of the bottle that creates the vacuum, not possible by simply shaking it?
It's the effect of moving the bottle down faster than the liquid can be brought with it, hence him saying you might even want to wet your hand so the bottle moves more. If you shake something, the air may become trapped in the liquid, such in the form of bubbles. He noted it doesn't work with carbonated drinks as the bubbles will fill that vacuum, not causing the same violent reaction of the vacuum being filled 10x faster. Shaking doesn't create a vacuum anywhere, it would just move the air around the bottle as well as the liquid.
Air don't need to be entered at the top cause hitting the top with force builds the pressure in cause a bottle isn't air tight anyways with a lid on. The bottle has some air init before opened, but the rubber hammer or the Parm of your hand must play a part init to stop the air escaping out the top once hit so the only way is down
My theory would be try hitting the hammer on the top without creating a seal, only hit the rim or the edge with all the same procedures as you did
Or try diffrent bottles or wider bottle necks with also my theory 🙂