The history of the barometer (and how it works) - Asaf Bar-Yosef

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  • Опубліковано 23 гру 2024

КОМЕНТАРІ • 684

  • @Tombee2
    @Tombee2 6 років тому +861

    2:41 instead of a light bulb there is a candle which is historically accurate.

  • @GuillotinedChemistry
    @GuillotinedChemistry 6 років тому +306

    This is definitely one the best video I've found on barometers. Really nice job on explaining misconceptions about vacuums.

  • @Sevalithi
    @Sevalithi 10 років тому +1324

    Oh these little scientist dudes are so cute!

    • @satire9298
      @satire9298 10 років тому +10

      No homo?

    • @Sevalithi
      @Sevalithi 10 років тому +52

      He feels like he needs a disclaimer whenever he compliments guys. Probably because he's not secure in his own sexuality.

    • @marafradella2712
      @marafradella2712 10 років тому +1

      Thank you!

    • @intelX1000
      @intelX1000 10 років тому +8

      Kyle Sanchez
      This is what's called 'projecting'.
      You always check if your projection is correct before stating it, or you'll look like Kyle, the liberal.

    • @timlang3852
      @timlang3852 7 років тому

      Kyle Sanchez o

  • @MalaysianTropikfusion
    @MalaysianTropikfusion 10 років тому +12

    I have to say, the characters in this animation are the cutest I've seen so far. Love it!

  • @ssathe8273
    @ssathe8273 27 днів тому +1

    "Until necessity raised the issue " : such a deep and wonderful quote ❤️❤️

  • @MelihCANBOLAT
    @MelihCANBOLAT 7 років тому +151

    3:23 The height should be measured from the surface of the liquid

    • @Simon-mr6zy
      @Simon-mr6zy 6 років тому +2

      yes!

    • @harsh2032
      @harsh2032 5 років тому +5

      good eyes sire!

    • @terenceting26
      @terenceting26 4 роки тому +1

      I had that question, thanks for confirming. Ted-ed should at least pin this comment. The graphical designers might not understand this.

    • @eljison
      @eljison 4 роки тому +5

      Not necessarily. You just need to measure the change in height from any known reference point. If you start with liquid (water or mercury) in the tube, you can make that the zero and calibrate it whatever pressure you want (1 atm, for example), then measure the height relative to that reference point.

    • @hassaan1670
      @hassaan1670 4 роки тому

      thanks, i was wondering

  • @smitasuhas7981
    @smitasuhas7981 4 роки тому +165

    I have experimented this with mug in bath tub (Some Indians can relate)

    • @a.kzestos2085
      @a.kzestos2085 4 роки тому +2

      True

    • @yashrathi6862
      @yashrathi6862 4 роки тому +7

      the height of the water level at ground level is close to 9 meters, you can't do it with a mug unless you do it on high terrain.

    • @shaunakn5881
      @shaunakn5881 3 роки тому

      True lol

    • @askhfbfns67589
      @askhfbfns67589 3 роки тому +1

      not Indian but i can relaten lol

    • @RandomDudes710
      @RandomDudes710 3 роки тому

      I think that's what we call a faulty barometer or just not a barometer at all

  • @amyannaroy8357
    @amyannaroy8357 8 років тому +282

    good job with the graphics and explanation....

  • @kirstenkoch5920
    @kirstenkoch5920 8 років тому +41

    By far the best and simplest explanation I've seen. Good job with the graphics too!

  • @meghanakankara2883
    @meghanakankara2883 6 років тому +21

    Thanks for this video. I have been suffering to understand this concept but none was working but now this video with the explanation of the barometer and its history with splendid animation have helped not only me but many other students to understand the complexity and art of learning science. Thank you!

  • @raniahussein7002
    @raniahussein7002 8 років тому +182

    I am from iraq,,,,I like this way to understand information in study,,,,,,great video

    • @atiqueahmad3058
      @atiqueahmad3058 7 років тому

      Rania Hussein o

    • @moej3386
      @moej3386 6 років тому

      @@PhartingFeeting exactly-

    • @xOxAdnanxOx
      @xOxAdnanxOx 5 років тому +1

      Moe J what made you’ll go uncomfortable with it? lol

    • @KaramYagan
      @KaramYagan 5 років тому

      @@xOxAdnanxOx Chill. They are just pointing out that it is incorrect to use them this way. She should have put dots instead of commas, but.... Mehhh

    • @twitwilight6087
      @twitwilight6087 3 роки тому +1

      Hi Rania I'm pretty sure that you were in your first year in high school and having a trouble with studying physics and barometer when you wrote this comment, the same thing is happening 😂😂💔

  • @davidbooth3285
    @davidbooth3285 7 років тому +5

    Loved the way Torricelli had his lightbulb moment with a candle!!

  • @ChanchalKotal
    @ChanchalKotal 6 років тому +49

    This is my favorite channel so far because of the explanation and animation of each video. They are too good! Thank you Ted-Ed!

  • @MuhammadIqbal-dy5ks
    @MuhammadIqbal-dy5ks Рік тому +1

    Nice way of teaching 😊😊

  • @AbidHasan-tg7jo
    @AbidHasan-tg7jo 5 років тому +61

    3:23 the 76 cm height should be measured from the surface of the water.

  • @Blarmy_Korea
    @Blarmy_Korea Рік тому +1

    Totally helpful! I was confused abt the barometer but saw this video and understood everything.. Thank you

  • @jp4431
    @jp4431 3 роки тому +21

    So much knowledge we take for granted today were such brilliant discoveries back then

  • @abdulmalikalghazali8241
    @abdulmalikalghazali8241 7 років тому +8

    I like the way how you make it easy to understand by making it enjoyable

  • @briangardiner7574
    @briangardiner7574 3 місяці тому

    Use this video every year. Thank you

  • @boofang10
    @boofang10 Рік тому

    EXCELLENT video on the background of the barometer, especially the mercury barometer

  • @tejasnimbkar694
    @tejasnimbkar694 3 роки тому +4

    TED-ED team can you also make a you-tube video on Calculus
    Just beginning of it. It would be great

  • @kaushikpawar7508
    @kaushikpawar7508 3 роки тому +2

    Amazing work team💯

  • @FailCant
    @FailCant 9 місяців тому +1

    Truly fascinating

  • @zaoshmakujina2215
    @zaoshmakujina2215 2 роки тому +4

    This cleared my doubts which arised in the chapter Mechanical properties of fluids thank u

  • @Evan_Adams
    @Evan_Adams 10 років тому +19

    So.... what happened after 2007? How do we do it now?

    • @stephensnell5707
      @stephensnell5707 2 роки тому

      If you aren't aware Aneroid Barometers are now used and will be forever

  • @jeremiahyolok6663
    @jeremiahyolok6663 2 роки тому +3

    very good and clearly explained

  • @michaela9914
    @michaela9914 8 років тому +19

    Lovely explanation

  • @kokioto420
    @kokioto420 7 років тому +9

    I'm so thankful Ted Ed had a video on this, I needed this for my homework and this makes my homework more fun!

  • @garydunken7934
    @garydunken7934 8 років тому +104

    As usual, nice one TED! My 3 observations in this video:
    1. At 1:34 Gasparo Berti pulled his idea from his arse, literally! Thanks for the funny animation.
    2. Both Aristotle and Galileo behaved like jerks with regards to their knowledge of vacuum, albeit being good in other areas.
    3. How brilliant both Gasparo Berti and Evangelista Torricelli were, for thinking outside the box (or tube like you mentioned in the video!)

    • @PhysicsVlogs
      @PhysicsVlogs 8 років тому

      hahah u're right..

    • @crashsitetube
      @crashsitetube 8 років тому

      People also had a lot shorter legs back then. Between the Rubenesque women and short-legged men, it''s a wonder the human race has survived. But, enough inane silliness. Really good video. Thanks.

    • @anugopan5
      @anugopan5 7 років тому

      CORRECT

    • @dhanyak.j9618
      @dhanyak.j9618 4 роки тому

      Awesome 😊😁😊😁😁😁😁😊😁😊😊😊👍

    • @dhanyak.j9618
      @dhanyak.j9618 4 роки тому +1

      Good morning. Good night. Good for the video 👍

  • @urvijain2823
    @urvijain2823 2 роки тому +12

    2:59 - I have a question here : If you change the amount of water in the tube will the water still drop to 10.3 m?
    Amazing video btw, my teacher brought me here and I understood the concept of barometers so much better after watching this :D

    • @SydneyMadueke
      @SydneyMadueke 2 роки тому +3

      Yup it should. For example, if you repeated the experiment but with a 100meter tube, the water pressure in the tube is far greater than the surrounding atmospheric pressure so it would force the water out until the water pressure and atmospheric pressure are equal which would be when there is only 10.3 meters of water left in the tube. Correct me if I'm wrong UA-cam

    • @tiaxanderson9725
      @tiaxanderson9725 2 роки тому +3

      Yes, it's the weight of the atmosphere that's 'pushing down' on the water and thus 'forcing it up the tube'.
      So even if you made a tube 1000 meters tall, all the water would spill out until it reaches 10.3m as 10.3m of water equals 1 standard atmospheric pressure.
      It's also why the mercury barometer is only 0.76 m tall as mercury is much heavier than water. (so 0.76 m mercury = 10.3 m water = 1 atm)

  • @alligrim
    @alligrim 9 років тому +7

    Ted Ed saves my butt in my chem honors class every unit.

  • @sayemshahariaprethebe
    @sayemshahariaprethebe Рік тому +1

    Thank you so much

  • @MukeshKumar-zv1wk
    @MukeshKumar-zv1wk 7 років тому +1

    fantastic way to learn

  • @novakrypton5841
    @novakrypton5841 Рік тому +2

    I have a question.....if we put the barometer in a non inertial frame with constant acceleration upawards....will the level of mercury change due to pseudo force??

  • @twitwilight6087
    @twitwilight6087 3 роки тому +1

    I'm from iraq , this way of learning is amazing 💗

  • @hemanjalihemanjali2896
    @hemanjalihemanjali2896 7 років тому +3

    nice to understand easily

  • @Soneoak
    @Soneoak 10 років тому +7

    A vacuum exerts no force. It is the surrounding pressures that pushes the fluid into the tube to collapse the vacuum, and the weight of the fluid that establishes an equilibrium.
    The classic barometer is therefore a device that uses the weight(and hence pressure exerted by it) of a fluid to measure the opposing surrounding air pressure against it.
    As proper scientists, we always evaluate how our models would simulate the real world, and not the other way round. The world exists as it is. We merely describe it, not prescribe it.
    We propose models, then test them. Untested models are merely that, hypothesis, nothing more, but nevertheless, intrinsically valuable.

  • @Peppermint1
    @Peppermint1 4 місяці тому

    Worth mentioning that most times bad weather does not cause barometer drop. Small systems bring rain/snow without a drop in atmospheric pressure, actually sometimes the pressure may even increase. Mostly the large systems will cause a pressure drop. In other words., most of the time these barometers are worthless.

  • @andrewwarren3633
    @andrewwarren3633 4 роки тому

    There is a mistake at (or near) the 3:22) mark in the video. The dimension should be from the top of the pool of mercury, not the bottom.

  • @tueanhvu1627
    @tueanhvu1627 7 років тому +1

    I can't understand the experiment until this. Thanks =)))

  • @maulikshah28
    @maulikshah28 2 роки тому +1

    Great video, helped me understand the topic really well

  • @JoejoeReference
    @JoejoeReference 3 роки тому +1

    "Fortunately, he turned out to be wrong"
    A phrase commonly heard when Aristotle is brought up

  • @godfreyxbrown1393
    @godfreyxbrown1393 Місяць тому

    Great explanation 🎉🎉🎉

  • @josephcalabrese6337
    @josephcalabrese6337 3 роки тому +1

    I'm watching this video because my new digital watch has a Barometer App.
    Knowledge is power.

  • @unskilled_i_guess
    @unskilled_i_guess 7 років тому +1

    this helped so much

  • @muhittinselcukgoksu1327
    @muhittinselcukgoksu1327 8 років тому

    the other TED videos are not so ..They are very well.

  • @yashchaudhary9596
    @yashchaudhary9596 5 років тому +3

    I understood the concept of barometer bec of your video. THANKS

  • @PeteGravell
    @PeteGravell 8 років тому +13

    Nice video. But there is a small amount of mercury vapor in the space above the mercury, so it's not a perfect vacuum, and it does not prove Aristotle wrong. According to Wikipedia the vapor pressure of mercury at room temperature is about 1Pa.

    • @Abdullahss1
      @Abdullahss1 8 років тому +1

      Pete Gravell i don't think that there is a mercury vapor in all cases

    • @boeman6702
      @boeman6702 8 років тому +2

      Pete Gravell
      Aristotle was wrong in atomic scale as well...

  • @novachan69
    @novachan69 5 років тому +1

    Thanks dude u cleared my doubts

  • @vinitaugaonkar4683
    @vinitaugaonkar4683 9 років тому +1

    it was fun and learned easily

  • @priyalks1614
    @priyalks1614 9 років тому +3

    its so so so lively and understandable
    pls try your luck in many more topics

  • @jchae9820
    @jchae9820 4 роки тому +1

    thanks sir!! very useful actually

  • @manallarrehemi5838
    @manallarrehemi5838 Рік тому +4

    I totally agree that the thinking outside the box " the tube " is always the right way to find solutions , even if the others do not agree with you
    THANKS FOR THIS VIDEO 🥰

  • @melashop669
    @melashop669 4 роки тому +1

    el vídeo que necesitaba ver, muchas gracias

  • @ashenudayanga6359
    @ashenudayanga6359 4 роки тому

    Thanks bro...... before i see this video, i have no idea about this exeriment.

  • @naitikarora1694
    @naitikarora1694 3 роки тому +1

    This helped me a lot... Thank you soo much

  • @93mrravi
    @93mrravi 4 роки тому +2

    Beautiful explanation!

  • @Shinywhite
    @Shinywhite 9 років тому +2

    Very good explanation, tyvm.

  • @n8mail76
    @n8mail76 Рік тому +1

    thanks. must of us have only memorized these concepts taught to us. learning the mechanics behind how and why the concepts were developed bring a deeper understanding of the concepts.

  • @russel4942
    @russel4942 4 роки тому +3

    This really helps a lot and well-explained compared in schools

  • @gurbakshkaur1213
    @gurbakshkaur1213 4 роки тому +3

    Its very helpful.😊

  • @Pineapple_extract
    @Pineapple_extract Рік тому

    Great explaination

  • @31896eneri
    @31896eneri 9 років тому +1

    Great story!

  • @nileshvishvambhar6780
    @nileshvishvambhar6780 6 років тому +1

    It was Best explanation...
    Thankyou

  • @memo6032
    @memo6032 4 роки тому +3

    3:33 I don't know if sb wondered about this or not but the reason why increasing the volume of water didn't affect the pressure of the it and it didn't need to go lower in the tube to be in equilibrium with the pressure outside the tube is because pressure of liquids only depends on their *density, height and gravitational field strength*.
    So since the two tubes are the same height, and the gravitational field strength didn't change and we are using water in both tubes (density of fluid didn't change) it doesn't matter. This may seem like it doesn't make sense but you can google to see the proof of it.
    And if you still don't understand, it's okay, if I wasn't taking phyiscs this year I wouldn't have understood either 😂😂😂

  • @mahmoudashraf117
    @mahmoudashraf117 8 років тому +5

    not avacuum there is vapour pressure there but in minimum value so can be neglected without much error

    • @josyulasanshray2936
      @josyulasanshray2936 4 роки тому

      @Rocket Man on Suicidal Mission Yep there are only partial vacuums with very few particles per unit volume

  • @FuckNameImagination
    @FuckNameImagination 8 років тому +1

    one question, does the existence od the vacum creates a succion on the water?

  • @priyankabhardwaj4590
    @priyankabhardwaj4590 6 років тому

    ted ed is the best!

  • @billchoi2000lsc
    @billchoi2000lsc 8 років тому +5

    I love stories about challenging pre-existing theory and making major scientific breakthrough!!

  • @yenlingleong
    @yenlingleong 8 років тому +3

    Very nice!
    I've a question, at 3:22 , for the height of the mercury column (76 cm), is it measured from the base of the container or from the surface of the mercury in the container?

    • @henhaliusaz5984
      @henhaliusaz5984 8 років тому +4

      It's measured from the surface of the mercury. By the way, if you put the tube deeper into the container, the volume of the vacuum would decrease, and vice versa.

  • @chow143
    @chow143 9 років тому +5

    Extremely helpful

  • @popogast
    @popogast 7 років тому +2

    Nice and descriptive explanation.Well done.

  • @PhilippKirchner
    @PhilippKirchner 10 років тому +1

    Well made, and such nice animations ^-^

  • @ceff01
    @ceff01 5 років тому +3

    These are on planes for decision height altitude for anp/rnp landings in low visibility around mountainous areas

  • @duckiie15
    @duckiie15 6 років тому +1

    Beautiful execution👏

  • @kottananarasimhanaidu4851
    @kottananarasimhanaidu4851 4 роки тому

    Good job

  • @awasthiatul51
    @awasthiatul51 10 років тому +3

    thank you.. very nice exlanation

  • @ketfoen
    @ketfoen 10 років тому

    Thinking outside the box, I'm glad we have had people like that in the past. We have them today as well, but with so many public trolls around they don't get the chance to even speak.

  • @malv4935
    @malv4935 9 років тому +9

    This is awesome and so adorable, thank you :D

  • @ytfrgaming632
    @ytfrgaming632 3 місяці тому +1

    Amazing 😍😍😍

  • @VyvienneEaux
    @VyvienneEaux 4 роки тому +2

    I really enjoy Toricelli and his result.

  • @piggyparadiseplayz395
    @piggyparadiseplayz395 5 років тому +5

    This is a great video! thanks for the information!

  • @prashant.timilsina
    @prashant.timilsina Рік тому

    always such a wholesome videos✨

  • @shaziajehanzaib941
    @shaziajehanzaib941 6 років тому +2

    Awesome animation and explanation

  • @janvigupta558
    @janvigupta558 5 років тому +1

    Thanku so much this is really helpful🤗

  • @VVVV11995
    @VVVV11995 8 років тому +4

    HOW INTERESTING! THANK YOU

  • @siddhantshivam8973
    @siddhantshivam8973 3 роки тому +1

    Legends are watching in 2021 !

  • @rovelynsagayno6263
    @rovelynsagayno6263 7 років тому +1

    can anyone answer this question
    “In what ways does Alexander Calandra’s “The Barometer Story” illustrate the philosophical approach to a practical problem?

  • @pcg259
    @pcg259 5 років тому +2

    This vacuum is the void of matter but it is filled with a liquid more mysterious than anything mankind has ever tried to understand.

  • @samspiker3901
    @samspiker3901 6 років тому

    Thank you for the video

  • @TomWinkler-mz9yp
    @TomWinkler-mz9yp 6 років тому

    How does having a column of water higher then its surrounding go hand in hand with the connected vessels principle?

    • @TomWinkler-mz9yp
      @TomWinkler-mz9yp 6 років тому

      Communicating vessels*

    • @lutzderlurch7877
      @lutzderlurch7877 4 роки тому

      @@TomWinkler-mz9yp The communicating vessels are open to the atmosphere on both sides.

  • @divachauhan7491
    @divachauhan7491 7 років тому

    Nice work

  • @dunnuthalayellareddy7618
    @dunnuthalayellareddy7618 3 роки тому

    Thank you sir

  • @garetz2011
    @garetz2011 3 роки тому

    The mass of a 1mm square and 760 mm tall column of mercury is the same of a 10287 mm tall water column with the same section area. Is 10,28584 g the heaviest thing you can lift aplying vacuum on a 1 mm x 1 mm area. Is it correct? Since gasoline has 660 grams per liter density, vaccum could lift it 15,584 meters?

  • @rawanreda6908
    @rawanreda6908 10 років тому +1

    That was really good !!

  • @أنسمحمدحسين-ي8ظ
    @أنسمحمدحسين-ي8ظ 4 роки тому

    Great video. What is your reference?

  • @nibinkoshy8902
    @nibinkoshy8902 8 років тому

    what i don't get is, since gases and liquids are both fluids, how can the pressure act on the surface of the liquid, due to its lower density, shouldn't air be able to flow through the liquid which is of higher density and is it not just the air being filled into the barometer tube until the density of air particles inside the column of air inside the tube matches the density of air outside the tube and thus coming into equilibrium? if that is the case it would imply that as altitude increases, the pressure increases and this causes for the volume of air inside the barometer to occupy more space and this totally makes sense when u take into account that if the temperature is highest at the surface of the earth and as we go higher in altitude the temperature decreases(due to distance from the source of heat at the surface of earth) and hence the density of air should also increase.

  • @analinagarcia
    @analinagarcia 3 роки тому +1

    Such a great video. Thank you.

  • @neethandwrittennotes6196
    @neethandwrittennotes6196 2 роки тому

    Thank you !!

  • @vijaychandra8550
    @vijaychandra8550 6 років тому +1

    Thanks TED...nice explanation ever