The Archimedes Principle | Szydlo's At Home Science
Andrew explores the well know but perhaps not so well understood Archimedes principle.
We start off in ancient Sicily for a surprising dip in the bath with Archimedes, followed by a variety of experiments and demonstrations back in Andrew's basement lab. the properties of both liquids and gases are explored in a whistle-stop tour of this ancient but still vitally important scientific principle.
Chapters:
00:00 - Archimedes and the golden crown
07:45 - Introduction to Archimedes principle
08:30 - Using Archimedes principle experimentally
16:07 - Rubber, and Hooke's Law
19:23 - The hydro-static balance
20:45 - Liquids, gasses and compressability
24:51 - Archimedes principle with elastic fluids
28:59 - Compressible hydrogen gas
30:42 - Buoyancy
34:36 - Summary
Andrew Szydlo is a chemist and secondary school teacher at Highgate School, well-loved by pupils and Ri attendees alike. He has given public lectures around the country, been featured on TV shows and has become a popular regular face on our channel.
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That was so well explained. Another 30 mins well spent!
Sir your each video is clear ,vivid ,understanding , long time memorable , used easy words , correct and precise speech ,cleared confusion .
Indeed 👍
all these science principles made so easy to understand by demonstrations ,many many thanks ,this is usefull for me to promote science in students
16 X 4 is not 56. I was too polite to say However you did ask!
64.
He said 16, but he was thinking 14.
I was going to type, '4x16=64. Chemists are not necessarily mathematicians.', but you negated it! Excellent history, explanations and demonstrations. Thank-you.
Excellent lesson, I haven't seen these demonstrated in many years. Thank you, sir.
amazing...keep getting these out they are very important...detailed and demonstrated experiments...great work
Archimedes was a man with strong principles. Holding up til today.
Imagine committing the perfect crime, undetectable, a crime passed down from master to apprentice craftsman for centuries... and then a naked madman runs into the room saying he has discovered how to detect the crime you just so happen to have committed against a monarch who can have you killed at a word. No, I would not have liked to be in the goldsmith's shoes, either. I suspect that the brick he dropped was _also_ not made of gold.
Thanks again. Dr. Szydlo.
Another great talk Andrew, many thanks.
This was amazing in all respects. Simply superb. Hope you keep these coming😀
Also give a talk on Michael Faraday and his work...it would be a great pleasure
Your knowledge, with your inflexible fluid (clear and fluent as H2O) presentation, makes me a bit more buoyant on life :)
Excellent presentation!
Thank you, that was a very clear explanation?
Thanks Andrew love your vids.
I love watching your videos, and I appreciate the time and effort you put in. As an engineer, I do however have to have to say something... all the way from middle school to university, I kept hearing science teachers say "water is incompressible". My father, as an engineer himself, also told me this. At some point, I got in a heated discussion with a friend engineer about the compressibility of water... he was claming to be incompressible, but I, of course, said there is no known material that is incompressible and that teachers say that about water, just beacuse the compressibility of water is negligible in common applications. The explanation I could come up with, after 2 or 3 beers, to prove my point, was that if you take a rigid recipient, like a glass bottle, with no cap and you lower it to the bottom of the ocean, and you put the cap on, the recipient will breake while trying to bring it back to surface. I went on and said it brakes when the diffrence between the pressure in the bottle and the pressure outside of it, gets too high for the rigid recipient to handle. Feeling prowd of my made up experiment, I made the closing statement "the pressure exists in the bottle, because the water is trying to expand from a compressed state". He looked at me for 3 to 5 seconds and said "all the professors told me water is incompressible, you think you know better?!". Sadly, after that, I gaved up on him. Btw, water is about 3 times more compressible than steel. So please Mr. Szydlo, help me on my quest to stop desinformation on the compressibility of water, and mention that it has a relativly low compressibility, rather then saying is incompressible. Thank you! Looking forward for more videos!
@William White I think you and I, both said the same thing regarding the compressibility of water, yet you think I am "just confusing matters". About the 2nd part of your reply, I can only say that you are correct. I should have posted more details, but I thought they are beside the point and would just make my already long post, longer. I really don't think that saying "it is incorrect to state water is incompressible" is pedantic. Saying that water is incompressible, when in fact it is compressible, is just wrong. I have nothing but respect for Mr. Szydlo and I plan to play his videos for my kids when they grow older. I don't know why your reply was so aggressive, the only thing that driven me to post a comment was good intent, and maybe a bit of nostalgia.
@William White Does sound travel at an infinite speed within water? No, because water is not incompressible. Why does the speed of sound increase with depth in water? Because water gets more and more compressed while you increase depth(pressure).
I did spot the error! But won't spoil it for others. I found this an easy to follow explanation/demonstration - the guy seemed to enjoy his presentation, too. Most important, now, is that I know the story behind the the principle as well as understanding how it might be applied.
Thank you - makes things clearer!
How you got it 3 days earlier
omg 3 days early
@@carlosrodriguez8988 our Internet sucks!!!
@@user-km3wr2fr7h for real:(
@@carlosrodriguez8988 Faster world dude, faster world!
Dear sir! Can you give a talk on electrolysis of water briefly. How we can produce more hydrogen and oxygen out of it and can you built a demonstration model for that..?
It's about 50% efficiency splitting water as a source, storing energy in batteries 90%, fracking for hydrogen 80% from fossil fuels, hydrogen hard to store, but safer than ammonium nitrate, LoL
Brilliant lesson demonstrating how fascinating physics is. I also can't help but wonder if the spelling error in the description was deliberate or not ^_^
Well, as you say, this is absolutely true. Some ships have an inherent self-righting ability. Mostly, those that follow the laws of physics, and have a centre of gravity which is below the centre of buoyancy. While other boats are inherently unstable. Such as a caveman, riding a log across the river. This requiring much dynamic compensation, to make sure the log remains upright during the journey. :-)
Thanks Prof. Szydlo! Did somebody already ask about authors and titles of the books? PS: please more science at home!!!
I'm not a metallurgist, but wouldn't the volume of a bar vs a crown be different depending on how the gold was smelted/cooled? Or not enough to make a noticeable difference?
The prof is great !
scientific accuracy demands to tell that at some minimal level water and liquids are also compressible otherwise sound would not propagate in water. We can consider them incompressible for practical reasons but that is not entirely true, otherwise no one could explain why sound propagate in water.
why, oh why weren't you there when i needed you the most in my physics class...
Will you continue to do videos on chemistry of photorgraphy, Professor? Is it because of the pandemic situation that you stopped?
Wow you sir sound soo..... Positively magnetic! 🌝
WTF SIR its 2 am here and i see you with archimede ? OMG ♥ Sir Szydlo, its a honnor, regardless of the time, im here, as (i hope) a good student ! Thanks for all, thanks for me and plz more ♥ (sorry for this so bad english, im french :( )
In the light of this video, have you an explanation on how Jeff Koons' equilibrium was achieved? I feel like that I kind of know the tricks, but I'd like a scientific explanation nonetheless. Tnx, love your videos
We actually made a video about that - kzhead.info/sun/qc-IerlqpqWdnZE/bejne.html - or if you prefer an article, The Atlantic has a brief explanation on how he achieved the floating ball effect - www.theatlantic.com/entertainment/archive/2014/07/the-science-behind-the-art-of-jeff-koons/374614/
I was totally following until the phrase "apparent weight" ... Love the rest - just not that term. One should speak of the tension in the suspending chord (or elastic band) and the buoyant force, relating to the equilibrium of the submerged mass. So many get this wrong, even Prof. Dave in a similar with with force vectors on a ship.
People you learned something today. That’s a good thing.
Does the shape of an item change the accuracy of the testing? Or, the porosity of the object change the test? At my work they use this way testing to determine how much waste steel is in the slag we buy. And I just wondered if the math was right.
@William White thank you this clears up the misunderstanding i had.
thank you
Nice episode....
If you're ever in Scotland come and see the Falkirk Wheel on the Forth & Clyde canal. The most superlative example of Archimedes Principle in action. To get over a hill, rather than the usual series of locks to raise canal boats, the Wheel has two sections of canal on "cylindrical" like structure each with water tight doors at both ends. The two sections of canal are identically filled with water so both sides of the "wheel" weigh the same and are in balance. This is where Archimedes brilliance applies. Any barge on the canal, even one heavily loaded with coal, as long as it floats, it displaces it's own weight of water. So the two sides of the Falkirk Wheel always remain in balance. Google it for a weigh better description 😂
Was archimedes actually aware of the untrust aspect, which is more related with floating than displacement
Sir, I learnt too much knowledge from you .
I didn't hear the term "Specific Gravity" used. Is it not used any more? Did I miss it?
I hadn't heard of the term _"Specific Gravity"_ until now! I looked it up; it's the same as -"Relative Density."_ That's the term I was taught in school. Wikipedia too says it's the preferred term. Not having used _"Specific Gravity"_ before, it sounds to me like the value of gravity at a specific location on Earth. I'm not able to relate it to the density of materials. Then again, if you hadn't heard of _"Relative Density"_ before, to you it probably sounds like the number of siblings, cousins, uncles, aunts etc. per generation of a family tree 😂
@@nHans This is the way it was taught in high school the US in the 1960's, and again when I was studying Geology in the 70's. I suspect it is a hold over from the Victorian era. I wondered if it had fallen out of favor.
How did archimedes find the weight of the impurity.
i was wondering how 16x4=56 but then Mr Andrew was being cheeky at the end
Parker multiplication.
He probably did 4 x 10 and 4 x 4, first part fine but second part wrong obviously
More videos!!
Since we are running low on Helium and Helium escapes the Earths atmosphere, lost forever, should we start filling Balloons with Hydrogen maybe? Perhaps with a warning attached about open flames.
Helium also escapes from balloons. Balloons deflate over time because a tiny amount of gas can escape from them. Wouldn't help.
64 my friend Like your videos very much Greets from Holland
The Pyromaster is baaaaack!!!!!!!!!
I just understood right now why some people say "cc" instead of liter subdivision. Cheers sir
This guy, always handling 5M HCl without gloves!!
18:54 lol mistake, he said 4 16's is 56 when it's 64.
There could have been voids in the crown casting.
Arguably, it still wouldn't be "solid" gold then.
you said 16 times 4 equals 56 ...
I heared it a day later!
Just stopped the vid at this point and searching comments to verify, lol. I actually said to the screen "no its 64" and then doubted myself cause he is a boffin and i am a pleb, lol.
You might want to watch all the way to the end (namely the bit at 35:13). ;-) I blame Terry the rubber salesman, though.
4x16-8 = like rubber and hooks law when streched to its tensile capasity the inversion of facts. But not to the dimentional capisity of conscious understanting of mass. Therefor yes it is 56 as 64 is the inversion of math when numeric symbols are streched to the limits of the capasity of electrons to bind literally to our conscious understanding of gravity + 1.
16×4=64 not 56 hope I am right.
But what about the gems?
Wish he’d write a book
What exactly do we need teachers for, when this guy is clearly better at the job, and in this case unpaid!
A strange thing to say after watching a man who has been a teacher for most his life.
By Gum Boss!
He should have used tungsten for the replacement base metal...
The melting point of Tungsten is 3695K. The boiling point of Gold is 3243K. Does Gold dissolve with solid Tungsten like Mercury does into Aluminum?
you cannot confirm the density of material, using just weight and volume, shape affects your measurement
you should sink the whole thing deep, also if you have bubbles or cavities inside your material it affects things
Strange. Archimides doesn't look chubby enough to have sufficient volume to overflow his bath.
Well everyone likes to have a good streak sometimes. lol
Just when you think you fully understand a subject.
The irony of bad camara work from the R.I.
Oscar does his best though.
Turns out phones aren't the ideal form factor to do live camera work. ;-) The RI probably could loan them a decent camera + tripod + microphone, though. I doubt they're using them for anything else during lockdown.
This old-timer lost the main plot or subject of explaining the Archimedes principle instead he weird off explaining something else. Archimedes did not use rubber nor he has spring Balance in his experiment. He simply demonstrated to the king; the displacement of water comparing with the original weight of the Gold with Gold Crown displacement of liquid and that's how he declared there was an impurity in the Crown. The rest of the other explanation is simply physic.
14 People who believe the Flat Earth mantra of "Relative Density" thumbed down this video.
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information is DEAD ! .. long live interpretation
Meaningful comments are dead, long live pointless trash above.
Думаю так : чем старше препод, тем лучше он должен понимать принципы педагогики изложения ! Наглядность ! демонстрация ! Пояснение ! ... что мы видим здесь ? ..картавого старпера в каком- то подвальном туалете , более получаса поясняющего детскую, от силы полуминутную муйню! Бррр !...
@Andrey A. более 36 минут , мучачо !.....и достаточно всего 2-3 ! А На английском нужно еще меньше ! ...ты не понимаешь педагогики изложения вообще ! ...учебные пособия обычно принимает спец.комиссия ! за " резину" , за хоть намек на двоякий смысл сказанного , за непоследовательность, за ненаглядность и тд тп - это всегда незачет и даже взыскание !
@Andrey A. ты говоришь уже о личных вкусах и преференциях , а я о классике преподавания и изложения ! Если дать эту тему сказочнику ,напр. то получится еще круче !)) На уроке уснут не только дети , но и взрослые) ! Видимо ты в этом возрасте и задержался, раз тебе такое на вес золота .. ) ! Посему и зачастую люди не понимают даже др.др.на одном языке ! Как австралопитеки неандертальцев ) ! Это были просто разные виды ! Знания же , если они не системны и не ранжированы ,вредны и обществу и опасны здоровью ! ...именно по этой причине и возникает изобилие наполеонов в наше время !
@Andrey A. +...твоя фразка : " одна скучная зарубежка " .) . Вообще свалила с ног )) !.. хоть ты и не из понятливых, но поясню заодно и другим , кто мб.это прочтет : в теперешнюю кремлевскую госпрограмму сезонной традиционной переделки истории, входит накидывание всякой всепупковости всея и тотальное обсиренивание всей зарубежки , вкл. Ист. познавательные и даже детско-развлекательные программы и ресурсы ! Ответственна за это ЕДРо ! с прикрепленным ротирующимся олигархатом и тд ! ..именно они нанимают всяких нео-историков типа задорновых-обхлобыстившихся соловьевых-чудиновых и др ! ) ..здесь надо понять , что 5 млн.армия совковых пропагандистов не ушла с развалом сссэра на рабочие должности ..и справляются с работой ответственно и с энтузиазЬмом ..!) Достигли уже Абсурда в абсурде , но упорствуют и далее ! ) ..+ русский ИзыкА-на 70% заимствован , но не признается нигде в мире эквивалентным другим языкам ни юридически, ни технически ! Поскольку заимствован абсолютно навыворот ! И даже При наилучших его переводах и адаптациях, он остается вывернутым и неоднозначным ! И посему пригоден лишь для Мифотворчества , бесконечной тавтологии и конечно же святого вранья ) ! ..без зековских интонаций , перекрикиваний, повелительных наклонений(рудиментарных уже полтора века во всем мире ) , без воплей убеждения и обилия междометий , этот язык просто не существует !) ...правильное образование оно д.быть не на рус.язе! ..но только если и думать не по -русски ! Иначе человек становится просто извращенцем !... компенсация и образец непониманий этого породила новое поколение феодалов , которые в одном лиТце УсеХда и обязательно есть враЧЬ , и каЦманаФфт, и учитИль! )...
@Andrey A. мнения окружающих феодалов и даже их характер не изменит даже концлагерь !) Это доказала жизнь и еще австрийские профессора -нацисты ! ..ровно как и тебе -убить в себе враЧа, каЦманаФфта и учитИля в одном образе !) А то ты так умничал , а оказалось вот оно чО...) ..повторюсь :(что писал это для других )! ..как думаешь можно ли глиста переубедить в том , что существует другое жилье , среда , пища , запах, и свет ?....