I sincerely hope she reads the comments and enjoys the praise! Hannah Fry is a sexy nerd. There's nothing wrong with that. Infact, we need more of them.
You've never heard of custard or crumble? Well they are key players in the dessert course in the UK. You can get all kinds of fruit crumbles, and often they're served hot with hot custard... Absolutely yummy!
I've seen this done with cornstarch, which is much cheaper than custard, on Mythbusters. One good cornstarch trick is to pour it into a flat pan like a cookie sheet, about a centimeter deep, and slap it. The observer will be expecting a big mess as it splashes all over the room, but instead, it just jiggles a bit and never leaves the pan.
Custard is actually shear-thinning (well, technically it is a generalized Newtonian fluid). What you are thinking of is a cornstarch suspension, sometimes called "oobleck," which is shear-thickening.
why is a gorgeous mathematician with a soothing voice telling me stuff about physics? aren't there enough amazingly interesting math related discoveries?
its not about stopping a bullet, its about dispersing its energy. it converts pressure from a single point into a much larger area. Its the difference between putting a brick on a standing needle resting on your hand, and putting just a brick on your hand.
Actually Quicksand isn't a myth - quicksand can form in certain environments. Usually near the coast, or near river banks. What is a myth, is that people get sucked underneath it. You can get caught up in quicksand as applying pressure to it makes the sand and water mixture more viscous. But a human being could never get totally sucked under as quicksand is more dense than a human. The best thing to do is float to the surface on your back... The scariest fiction comes from science...
If (and whether random beanie manufacturers can get this right is a big if) the custard layer surrounded a softer, inner layer (think cotton wool, corresponding to the foam in a helmet), it could work well. Both layers would normally be flexible, but in a collision, the outer layer goes hard and then you have a spread-out, soft, compressible inner layer that will soften the blow.
Sorry, you are right. I miss read the article in that it described Kevlar as liquid armor. When in fact they were referring to a treatment process that makes the Kevlar vest lighter through exposing it through certain liquid chemicals. Sorry for the confusion, I am usually better at this.
The faster drawing are a good improvement. At least we can see the images instead of half finished drawings that are already explained before it's finished.
The first point you are actually right on. Kevlar is a fiber and I really should not type comments after trying to pull an all nighter. However, we are both wrong when it comes to what glass is. Glass is actually something called an Amorphous Solid. Which means that it lacks a crystalline structure and will not hold the a shape. That is the actual reason why the glass in old churches is thicker at the bottom. Also, I stated certain types of glass, tempered glass does have a crystalline structure
crumbles are very similar to what we call pie in the US. Custard is similar to pudding in some ways, but a bit thicker. More like the bavarian cream you would find in some cakes or some donuts. very good stuff :D
Yes, I stand corrected. Though the misnomer 'quicksand' is very misleading and made me say that line. As I added in the other comment; liquefaction may be the better term. Still it doesn't have that ring to it I agree.
Quicksand and paint do not have the same fluid properties. Quicksand viscosity increases with shearing while paint viscosity decreases with shearing. Quicksand is rheopectic while paint is usually thixotropic.
I wish people explaining this would tell people that you can't walk or shoot fresh custard you need to une packet custard due to it's high cornflour content, in fact you can use cornflour and water to make a non Nutonian fluid.
What about using a non-newtonian fluid in a mobile phone? So if you drop it it can protect it? Would that work or would the change from fluid to solid damage the electrical components inside?
Between liquid and solid there is one other. Napalm contains gel-ing agent, later used in blue minty gel toothpaste, food thickners (guar gum), and hair gel. It could also be used to turn ice liquids into room temperature gels.
non-newtonian fluid has varying densities depending on the amount of vibration that passes through it. that's why upon receiving a certain amount of vibration it denses up turning itself to solid and possibly shatter upon receiving too much vibration.
Wrong. Kevlar is a fibre, and glass is not a fluid, contrary to popular belief. In fact, glass is only thicker at the bottom in old windows because glass makers of the time the windows were made could not make perfectly flat glass, and so made it slightly thicker at one end and stood the window on that. QI is a brilliant TV show. Gives you all these facts :P
Smart , beautiful and , oh , that voice . Truly a pleasure to watch your video Hannah . May's wry humour had me reaching for it but you clinch it. Count me "subscribed"
dat voice, omg.. Headphone on, science turn on! Great to see that nonnewtonian fluids are being tested on all those different areas but what about those real tests? Head Squeeze should test it, don't you think?
ive looked into this for the beanies basically the liquid is in tiny tubes which are full, those are ten used as a thread of sorts as part of the stitching
helmets are primarily intended to dissipate energy and reduce the maximum g-force experienced, hence foam not metal, spreading force is a secondary function. Much different from body armor which primarily spreads the force of a point impact over a broad area and secondarily absorbs energy.
The fluid in a bullet proof vest solidifies in 1/1000th of a second, a standard NATO 5.56 x 45 bullet travels at on average just over 3000 feet per second. Surely that mean the bullet will penetrate pretty far before before the fluid has had a chance to react?
Who knew it would be awesome if we could use nano particles to catch the bullet and then underneath the nano particles we could put the custard to catch the impact as a second pillow
@Head Squeeze Question: lets say I get a wound on my finger, and I then try to grab something with the wounded hand the wounded finger moves away from the object that I am trying to grab.. why is that? Thanks. Morten
Yes, I speak French. I live in Québec, Canada... I probably know this from another name. Could it be Irish Cream? Or Boston Cream? I don't remember having seen English Cream, but I'll keep my eyes open. Thank you for the info! ;D
Why custard and not corn starch and water? I find that behaves better for this demonstration than custard. But, that's just me. I've used that as a way of explaining ski dampers (in the early 200s) and modern G-Form pads
Ketchup also separates slightly over time. So I always have to shake the ketchup bottle before I turn it over, otherwise, I get this watery goop that tastes bad. XD
Mythbusters tried the bullet proof non-newtonian vest... didn't work :D Also, saying custard is kinda misleading, seeing as it's the cornflour in some custards that makes it behave that way :P
Hmmm. I thought the whole "quick sand" thing was Hollywood bull spit. It would be to dense to sink into regardless of state. I guess I'll have to look into that. It would've been nice if you described what's going on molecularly if we know or the current theory of these non-newtonian substances if we don't.
got it arse about with the "dead horse"; allowing it to flow by being patient and inverting the bottle whereas a sharp blow to its base will shock it into the more solid state. As you say yourself in relation to the non-Newtonian fluid bullet-proof vest.
if they where to make a BP vest that can withstand a 300m/s round (most likely a pistol/parabelum 9mm round) out of this stuff I don't think it would be THAT useful, I mean even though the 9mm (And lower) are the more common, if you where to meet a 44, 357 or hell even the 50 cal action express (I think that one is weakest of the 3 mentioned) you'd be screwed. and I don't have to mention rifles whose rounds are made to penetrate. Or it might as well be the best kind of body armour, lets wait&see
Hannah is just a perfect arrangement of atoms. And her voice a delicate melody
"Apply force to custard..."
Yes. I will do whatever you ask.
Everything about this from the material to the speaker to the editing and sound were perfect.
Her voice is so hypnotizing O_O. Oh custard being bullet proof vest...Cool!
I sincerely hope she never reads any of the comments on any of her videos.
benedictify Why? Most of them are nice
benedictify I clicked this video for the content, but her voice is very sensual, you have to admit...
@@killerFreak99 Because it's noble to assume women are too fragile to face online comments.
I sincerely hope she reads the comments and enjoys the praise!
Hannah Fry is a sexy nerd.
There's nothing wrong with that. Infact, we need more of them.
You've never heard of custard or crumble? Well they are key players in the dessert course in the UK. You can get all kinds of fruit crumbles, and often they're served hot with hot custard... Absolutely yummy!
I've seen this done with cornstarch, which is much cheaper than custard, on Mythbusters. One good cornstarch trick is to pour it into a flat pan like a cookie sheet, about a centimeter deep, and slap it. The observer will be expecting a big mess as it splashes all over the room, but instead, it just jiggles a bit and never leaves the pan.
Custard is actually shear-thinning (well, technically it is a generalized Newtonian fluid). What you are thinking of is a cornstarch suspension, sometimes called "oobleck," which is shear-thickening.
Christ almighty she is gorgeous.
why is a gorgeous mathematician with a soothing voice telling me stuff about physics? aren't there enough amazingly interesting math related discoveries?
Mathematics is the language of physics. Her PhD thesis was on Fluid Dynamics
its not about stopping a bullet, its about dispersing its energy. it converts pressure from a single point into a much larger area. Its the difference between putting a brick on a standing needle resting on your hand, and putting just a brick on your hand.
Actually Quicksand isn't a myth - quicksand can form in certain environments. Usually near the coast, or near river banks.
What is a myth, is that people get sucked underneath it. You can get caught up in quicksand as applying pressure to it makes the sand and water mixture more viscous. But a human being could never get totally sucked under as quicksand is more dense than a human. The best thing to do is float to the surface on your back...
The scariest fiction comes from science...
The first 10 secs were amazing
4:43 SUPER SWEET
You're not alone!
If (and whether random beanie manufacturers can get this right is a big if) the custard layer surrounded a softer, inner layer (think cotton wool, corresponding to the foam in a helmet), it could work well. Both layers would normally be flexible, but in a collision, the outer layer goes hard and then you have a spread-out, soft, compressible inner layer that will soften the blow.
Sorry, you are right. I miss read the article in that it described Kevlar as liquid armor. When in fact they were referring to a treatment process that makes the Kevlar vest lighter through exposing it through certain liquid chemicals. Sorry for the confusion, I am usually better at this.
The faster drawing are a good improvement. At least we can see the images instead of half finished drawings that are already explained before it's finished.
Please do a science podcast, Hannah! Your voice is just amazing :D
The first point you are actually right on. Kevlar is a fiber and I really should not type comments after trying to pull an all nighter. However, we are both wrong when it comes to what glass is. Glass is actually something called an Amorphous Solid. Which means that it lacks a crystalline structure and will not hold the a shape. That is the actual reason why the glass in old churches is thicker at the bottom. Also, I stated certain types of glass, tempered glass does have a crystalline structure
crumbles are very similar to what we call pie in the US. Custard is similar to pudding in some ways, but a bit thicker. More like the bavarian cream you would find in some cakes or some donuts. very good stuff :D
Yes, I stand corrected.
Though the misnomer 'quicksand' is very misleading and made me say that line. As I added in the other comment; liquefaction may be the better term. Still it doesn't have that ring to it I agree.
Quicksand and paint do not have the same fluid properties. Quicksand viscosity increases with shearing while paint viscosity decreases with shearing. Quicksand is rheopectic while paint is usually thixotropic.
I wish people explaining this would tell people that you can't walk or shoot fresh custard you need to une packet custard due to it's high cornflour content, in fact you can use cornflour and water to make a non Nutonian fluid.
What about using a non-newtonian fluid in a mobile phone? So if you drop it it can protect it? Would that work or would the change from fluid to solid damage the electrical components inside?
Between liquid and solid there is one other. Napalm contains gel-ing agent, later used in blue minty gel toothpaste, food thickners (guar gum), and hair gel. It could also be used to turn ice liquids into room temperature gels.
non-newtonian fluid has varying densities depending on the amount of vibration that passes through it. that's why upon receiving a certain amount of vibration it denses up turning itself to solid and possibly shatter upon receiving too much vibration.
Wrong. Kevlar is a fibre, and glass is not a fluid, contrary to popular belief. In fact, glass is only thicker at the bottom in old windows because glass makers of the time the windows were made could not make perfectly flat glass, and so made it slightly thicker at one end and stood the window on that. QI is a brilliant TV show. Gives you all these facts :P
Smart , beautiful and , oh , that voice . Truly a pleasure to watch your video Hannah . May's wry humour had me reaching for it but you clinch it. Count me "subscribed"
anyone made corn flour punch at home? pretty fun!
I missed out on so much because I was always told not to play with my food...
There's a Doctor Who fan in the house everyone!
dat voice, omg.. Headphone on, science turn on!
Great to see that nonnewtonian fluids are being tested on all those different areas but what about those real tests? Head Squeeze should test it, don't you think?
ive looked into this for the beanies basically the liquid is in tiny tubes which are full, those are ten used as a thread of sorts as part of the stitching
I would watch her present anything.
I guess her idea of a good date is a guy with a bowl of custard.
YES!!1! Instead of just not doing invalidating ballet, we can pour custard in our shoes! What a time to be alive!
lol now dogs will be eating ballet shoes and "the dog ate my shoes" will be the new excuse for ballet dancers being late to recital.
helmets are primarily intended to dissipate energy and reduce the maximum g-force experienced, hence foam not metal, spreading force is a secondary function. Much different from body armor which primarily spreads the force of a point impact over a broad area and secondarily absorbs energy.
uncooked custard powder is also highly flammable when aerosoled.
YT's really screwed, found this on other sites instead
Brilliant!
Its official, i'm in love.
so homemade cheap bullet-proof vest? awesome! best thing is when you get hungry just have some bullet-proof vest insides or just custard!
The fluid in a bullet proof vest solidifies in 1/1000th of a second, a standard NATO 5.56 x 45 bullet travels at on average just over 3000 feet per second. Surely that mean the bullet will penetrate pretty far before before the fluid has had a chance to react?
Her voice is angel like. =]...I wonder where I can find some crumbles in the states.
Why does this make me think impure thoughts...
Because you want to press her custard?
lol *Hanna smacks hands together multiple times while saying things like "hit it", "thwack it on the bottom" and "play with it"*
Who knew it would be awesome if we could use nano particles to catch the bullet and then underneath the nano particles we could put the custard to catch the impact as a second pillow
@Head Squeeze Question: lets say I get a wound on my finger, and I then try to grab something with the wounded hand the wounded finger moves away from the object that I am trying to grab.. why is that?
Thanks.
Morten
Soon enough every shirt will be made with the stuff, and everyone will have a vest that prevents penetration but passes all the energy into you.
Does the custard or anything like it re-liquefy after it solidifies
damn it. you blew my cover
That is the sciency-est adult film I've seen in a while
Damn straight!!
I had an idea for a liquid bullet proof vest in middle school and my friends laughed at me.
Second! Regardless what she talks about. I love hearing her voice!
Pretty cool stuff, love the presenter too
Yes, I speak French. I live in Québec, Canada...
I probably know this from another name. Could it be Irish Cream? Or Boston Cream? I don't remember having seen English Cream, but I'll keep my eyes open.
Thank you for the info! ;D
And now I want custard
She makes me want to learn,
Why Britishers are so perfect 🔥 voice , accent (addicted to it)...
Yes. Both liquids and gases are fluids because they have no fixed shape and their molecules are capable of flowing freely.
To the people at Head Squeeze please do a video on How To escape quicksand you know just incase it happens :P
300 m/s=
1,080 km/h,
984 fps or 671 mph,
583 kn. and
0.000 001 00 c.
Why custard and not corn starch and water? I find that behaves better for this demonstration than custard. But, that's just me. I've used that as a way of explaining ski dampers (in the early 200s) and modern G-Form pads
Captain Slow's cheese sauce may yet be used to fix potholes !
it makes her sound like a genius
Ketchup also separates slightly over time. So I always have to shake the ketchup bottle before I turn it over, otherwise, I get this watery goop that tastes bad. XD
Wow! That seems delicious! Now I want to taste it... :-0
Thank you for the info! ;D
HAs this something to do with the casimir effect? I once read, that "solidifing mayo" is the casimir effect
Mythbusters tried the bullet proof non-newtonian vest... didn't work :D Also, saying custard is kinda misleading, seeing as it's the cornflour in some custards that makes it behave that way :P
if the vest is lighter and more flexible when it is not catching bullets then it can have more coverage as well as greater freedom of movement.....
Jesus, they're just trolling me now. A video of Hannah Fry talking about what custard does when you spill it in your hand? Seriously?
mmph. the voice.
actually it kind of is...
High powered rounds disintegrate when they contact the surface of water.
That dress is hypnotic.
So based on this. If you encased some custard is a bullet head. It would hit hard and dissolve
Opposites attracts, eh? BOOOOOOM
wouldn't all the liquid just settle at the bottom of the vest? turning it into a custard donut?
I see, so the inner layer is still vital there :)
Thank you for the info. ;-)
Now I am hungry for cakes and donuts! :-0
I approve of custard.
What you are talking about could be liquefaction.
so you saying i could wear custard to a paintball fight and have a low chance of being wounded ?
0:06 - 0:08
THAT'S WHAT SHE SAID.
Better armor just means people get better guns
Tell me about it
Nice voice
why hasn't Netflix given her a show yet??
damn you!!
I think I would rather trust a ceramic vest than a custard vest lol.
I think fluid might be just a "state" so to say, so if I where to be a grammer police I think it would've been "... air is fluid?" with no a?
Scientific fun fact, Kevlar is actually a non-Newtonian fluid and so are certain types of glass.
Custard for life ! xD because it saves lives :)
Hmmm. I thought the whole "quick sand" thing was Hollywood bull spit. It would be to dense to sink into regardless of state. I guess I'll have to look into that. It would've been nice if you described what's going on molecularly if we know or the current theory of these non-newtonian substances if we don't.
He probably does. And still he is right.
Gorgeous and intelligent. I like.
hannah
oh, you brits. not only am i not alone, i'm in good company, too...
got it arse about with the "dead horse"; allowing it to flow by being patient and inverting the bottle whereas a sharp blow to its base will shock it into the more solid state. As you say yourself in relation to the non-Newtonian fluid bullet-proof vest.
A millisecond doesn't seem good enough when the bullet is moving 300 millimeters per millisecond!
if they where to make a BP vest that can withstand a 300m/s round (most likely a pistol/parabelum 9mm round) out of this stuff I don't think it would be THAT useful, I mean even though the 9mm (And lower) are the more common, if you where to meet a 44, 357 or hell even the 50 cal action express (I think that one is weakest of the 3 mentioned) you'd be screwed. and I don't have to mention rifles whose rounds are made to penetrate. Or it might as well be the best kind of body armour, lets wait&see