Measuring Pressure With Barometers and Manometers

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  • Опубліковано 24 гру 2024

КОМЕНТАРІ • 139

  • @michaelpisciarino5348
    @michaelpisciarino5348 5 років тому +128

    0:58 Barometer
    2:33 Hydrostatic Pressure
    4:02 Manometer, measuring pressure exerted by trapped gas
    5:00 Finding gaseous pressure
    7:36 Comprehension Check

  • @FlawzyOSRS
    @FlawzyOSRS 3 роки тому +16

    Came here for a simple explanation of a barometer 2 weeks ago, left with more knowledge and this weeks study material on manometers and atmospheric pressure testing for boiler draft. came back to say thank you for the thorough explanation, and great animated imaging for each. 10/10.

  • @mohammedragab231
    @mohammedragab231 3 роки тому +6

    Bruh a 7 minute video for free taught me more than the 1 hour lessons in school that cost us 1k a year

    • @rosemariegoodman4403
      @rosemariegoodman4403 Місяць тому

      Totally agree. I wasteful so much time before watching this video

  • @pancake5359
    @pancake5359 3 роки тому +6

    Why are you so talented and brilliant?😭

  • @ljbrown3311
    @ljbrown3311 3 роки тому +10

    Wow, I wasn't expecting the hair cut!! But great video thx! It really helps me explain things to my students. I often make them watch your videos for homework :)

  • @ajx8571
    @ajx8571 2 роки тому +6

    Well spoken, nicely explained and much better than the recording in my class. Nice job and thank you.

  • @mohammedragab231
    @mohammedragab231 3 роки тому

    YOU'RE THE GOAT OF EXPLAINING

  • @natimanman6934
    @natimanman6934 Рік тому

    I understood the topic I couldn't understand for 6 months thanks dave

  • @bukketboi
    @bukketboi Місяць тому

    DAVE I LOVE YOU THIS VIDEO SAVED ME

  • @nuramirasofeabintidzulkern5447
    @nuramirasofeabintidzulkern5447 3 роки тому +1

    EXCELLENT!! THIS HELPS ME A LOT!

  • @grizikemo7
    @grizikemo7 5 років тому +6

    I saw the notification for this video immediately I opened it

  • @1SM4h
    @1SM4h Рік тому

    Very nice explanation! Cheers from south Brazil 🤘🏻

  • @daniellezepess
    @daniellezepess 5 років тому +6

    Manometer: used to measure pressure
    Mahnamahnameter: used to measure Muppets

    • @scisarah3770
      @scisarah3770 4 роки тому

      I am beyond proud of this comment.

  • @Rituyadav-rs2nz
    @Rituyadav-rs2nz 3 роки тому +1

    Understanding easily, thanku so much 💖

  • @logyxox1855
    @logyxox1855 4 роки тому +3

    THANK YOU SO MUCH I UNDERSTOOD EVERY DETAIL🖤

  • @arshadshaikh5969
    @arshadshaikh5969 3 роки тому +5

    Amazing content, I love you for letting me understand this concept in such an easy manner, Subscribed

  • @coaldonelan4710
    @coaldonelan4710 4 роки тому +1

    Working to understand measuring pressure in a mechanical refrigeration system. Thanks for the help Dave.

  • @yeshroffson
    @yeshroffson Рік тому +2

    Thanks HELPFUL

  • @kanchanthakur7428
    @kanchanthakur7428 4 роки тому +2

    Nice explanation

  • @lukenavuwaivocevoce5699
    @lukenavuwaivocevoce5699 3 роки тому +1

    Dude love your explanation.Thanx alot..........

  • @bezzeone469
    @bezzeone469 9 місяців тому

    Spectacular explanation 🙌🏽🙌🏽

  • @ankitakashid1595
    @ankitakashid1595 4 роки тому +2

    Perfect sir I really appreciate your way of teaching......

  • @tanaymehta898
    @tanaymehta898 3 роки тому +1

    This really helped thanks

  • @MrUnit731
    @MrUnit731 5 років тому +8

    Hi. I found this channel because of the flat earth stuff, but I can't stop watching your videos. It's so annoying to not understand it all, but at the same time a good feeling. Thanks man ♠️

  • @002_moh.nouvaldy5
    @002_moh.nouvaldy5 4 роки тому +2

    so far, i really enjoy your explanation. hopefully, i wish you make more content in your videos. thanks

  • @rachelparedes7265
    @rachelparedes7265 4 роки тому +2

    this absolutely saved me, thanks so much

  • @Attalla-t9b
    @Attalla-t9b 7 місяців тому

    Very nice explanation of 'em!

  • @geniussidona
    @geniussidona 5 років тому +1

    Did you make a mistake in saying that the density is 13.6grams.. because the unit conversions is off. (going from grams to kilograms gives you a smaller number.)

  • @justinseagull3693
    @justinseagull3693 5 місяців тому

    as we go to a depth in a liquid the pressure increases but why is it opposite in a barometer?

  • @afrifagyasiwaah
    @afrifagyasiwaah 3 роки тому

    Please if the pressure exerted by the gas on the mercury is greater than the atmospheric pressure, does the atmospheric pressure still have an effect on the mercury to cause it to move even just a little bit?

  • @hanah.n1849
    @hanah.n1849 4 роки тому +1

    Best explanation ever, thank you 😊

  • @S01546
    @S01546 2 роки тому

    Simple and clear explanation. Great video.
    Thanks!

  • @taestyyumyum4952
    @taestyyumyum4952 Рік тому

    Thank you, this was really helpful.

  • @michaelgrimshaw1854
    @michaelgrimshaw1854 4 роки тому +1

    Hi. Do you know a standalone instrument that can measure the pressure inside a hyperbaric chamber in ATA or psi. Is there a wrist worn unit that can do this. Thanks for your help.

  • @SabinaRay-n9l
    @SabinaRay-n9l 3 роки тому +1

    perfect explanation, thank you!

  • @mohamedalexandrani2863
    @mohamedalexandrani2863 2 роки тому

    Can i know the name of app u use it to draw manometer

  • @karinas.1320
    @karinas.1320 3 роки тому

    But in the closed-end manometer, what gas is above the liquid on the right side? Doesn't the pressure exerted by the gas in the vessel then also depend on the gas exerted by the gas on the right?

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  3 роки тому +1

      I believe it's a vacuum on the other end so there is no other pressure to factor in.

    • @karinas.1320
      @karinas.1320 3 роки тому +1

      @@ProfessorDaveExplains Ok thank you Dave! 😌

  • @homosapiensqp3225
    @homosapiensqp3225 5 років тому +1

    2:10 density of water 0.997? At which temperature and pressure?

    • @LegallyMaking
      @LegallyMaking Рік тому

      It is 1 g/cc at 4 degree celsius , hence when the temperature changes it also changes

  • @homejonny9326
    @homejonny9326 3 роки тому

    Amazing explanation thaaaaannnks!

  • @yahiatutuncu7508
    @yahiatutuncu7508 3 роки тому +1

    Isn't the Hydrostatic pressure also called Manometric pressure?

  • @virgovirgo9367
    @virgovirgo9367 5 років тому +6

    Hi Dave! Long time.. No questions, just here to say 'hi!

    • @thezword669
      @thezword669 4 роки тому +2

      Oof he ignored you for over a Year

    • @aravshah1644
      @aravshah1644 4 роки тому

      @@thezword669 LOL Daves a failure..
      dosent know the diff btwn a star n a constellation.. it shd be us who must ignore him

  • @peterphori8618
    @peterphori8618 4 роки тому +2

    You explained perfectly except when you got to the part about pressure of a gas but the atmospheric pressure exerts more pressure and the subtraction which confuses me

  • @sangeetajinder7688
    @sangeetajinder7688 5 місяців тому

    6:55 why do we add?

    • @gamer_sandesh
      @gamer_sandesh 7 днів тому

      Because atmosphere pressure applied on the hg

  • @maximilliansantiago5208
    @maximilliansantiago5208 2 роки тому +2

    Hey professor dave! I have loved your videos for a really long time, they helped me ace chemistry and physics.
    Question for you. I work in a brewery and my co worker and I were discussing pressure of a closed system. Our fermentors have a sealable door and a pressure gauge that reads between 0-30psi. We were discussing why, if at sea level 1 atm/14psi of pressure is acting on us due to atmosphere, why when do you seal a tank does it not have 14 psi worth of captured pressure and read at 14 psi.
    My coworker thought it was additive and that it is 1 atm + what ever additional pressure you add to the tank. So effectively the gauge is tarred at 1 atm.
    My thoughts are that the diaphragm pressure gauges are not designed to translate barometric pressure into something readable on the tank and thus only when you have a fluid or added gas to the tank do you see the translation to a reading on the gauge.
    From this video i would think that then if we were to use a manometer that we would see that 1 atm of pressure acting on the fluid in the manometer?

    • @carultch
      @carultch 2 роки тому

      Unless there is a specific reason you would need a gauge that reads absolute pressure, most pressure gauges are built to display the vented gauge pressure, rather than absolute pressure, since it is much more economical to make a gauge for vented gauge pressure relative to the background atmosphere, than one for absolute pressure. It is the entire reason why a gauge is the namesake of gauge pressure.
      So this means that whatever pressure you measure on the gauge, is really that plus 14.7 psi that you'd need to use in any equation that depends on absolute pressure. If you used a manometer with a vacuum on one side, you'd have an absolute pressure measurement device.

  • @erikburzinski8248
    @erikburzinski8248 5 років тому +1

    professor Dave I have just noticed that if you search up how estrogen stops growth you get no results actually explaining how estrogen speeds up your bone age. I would highly appreciate if you were to rectify this issue on UA-cam as I think it would make an interesting video and no one else appease to have made a video explaining this.

  • @lorenzor.basebi9228
    @lorenzor.basebi9228 2 роки тому

    Quick question, what happens to the levels on the right side and left side of a Utube manometer when the gas pressure reduces by for example 20 of mercury

    • @carultch
      @carultch 2 роки тому

      The mercury would rise on the exposed side, and fall on the sealed side, if the external gas pressure decreased.
      A manometer set up to measure atmospheric pressure, would have a vacuum on the left, and exposure to the atmosphere on the right. When measuring a standard atmosphere, there would be a 760 mm difference between the mercury levels on the left and the right side.
      Suppose the two sides of the U, are 1 meter tall, and suppose the mercury level is 10 cm below its top on the sealed left side, when measuring a standard atmosphere. This means the right side will be 14 cm above the bottom, since the left side is 90 cm above the bottom, and 90 cm - 14 cm = 760 mm. If you take this manometer to a higher elevation, where the external pressure drops by 20 mmHg, then the mercury on the left will drop to 89 cm above the bottom, and the mercury on the right will rise to 15 cm above the bottom. The difference then, will be 74 cm, corresponding to 740 mmHg of pressure.

  • @lux-nocopyrightmusic
    @lux-nocopyrightmusic Рік тому

    Great video!

  • @christopher8199
    @christopher8199 4 роки тому +1

    thank you professor dave

  • @benYaakov
    @benYaakov 3 роки тому

    Thanks very much
    It helped me .

  • @Crescendo_theGreat
    @Crescendo_theGreat Рік тому

    thanks professor Dave :)

  • @1sewalker
    @1sewalker 5 років тому +1

    Excellent work. Thank you for the educational material.

  • @shrishri1522
    @shrishri1522 3 роки тому

    Good one!

  • @haninemohamed406
    @haninemohamed406 5 років тому +27

    Omgg this can't be true,I was just studying physics specifically manometers,barometers and so and I was very confused then I checked my phone to see the notification,wow

    • @aravshah1644
      @aravshah1644 4 роки тому

      so it means ur a MAD

    • @haninemohamed406
      @haninemohamed406 4 роки тому +3

      @@aravshah1644 man I don’t even remember writing this comment chill

    • @netad7771
      @netad7771 Місяць тому

      ​@@haninemohamed406 hi man u still there

    • @haninemohamed406
      @haninemohamed406 Місяць тому +2

      @@netad7771 yeah final year med student lol didn't end up studying physics

    • @netad7771
      @netad7771 Місяць тому +1

      @haninemohamed406 ohh good luck to you! I just started uni and we're revising everything in high school, so im here. That's awesome, I wanted to be a med student but ended up studying chemistry instead, for which I am grateful

  • @anilsharma-ev2my
    @anilsharma-ev2my 4 роки тому

    What is efficiency of barometer Aniroid barometer

    • @aravshah1644
      @aravshah1644 4 роки тому

      are bhai.. indian hai na.. indians ki iss amrici channel pe mat uda re.. sale delete kr

    • @anilsharma-ev2my
      @anilsharma-ev2my 4 роки тому

      @@aravshah1644 arey bhai kahana kya chahtey ho??

  • @geraldpabello2750
    @geraldpabello2750 Рік тому

    thanks prof

  • @justinxin8733
    @justinxin8733 3 роки тому

    Thanks, got my igcse physics test next Wednesday

    • @preciousoh705
      @preciousoh705 3 роки тому

      Did you pass?

    • @justinxin8733
      @justinxin8733 3 роки тому

      @@preciousoh705 Don't know yet, it requires at least one month to receive the result.

    • @preciousoh705
      @preciousoh705 3 роки тому

      @@justinxin8733 Oh I see. I'm rooting for you, stranger on the internet 😂

    • @justinxin8733
      @justinxin8733 3 роки тому

      @@preciousoh705 Thank you! I hope you have a wonderful day! Stranger on the internet 😊

    • @maria2k5
      @maria2k5 3 роки тому

      o levels or a levels?

  • @stephenhill8790
    @stephenhill8790 9 місяців тому

    I wish you had done an anaroid barometer as well 🧐

  • @ayeshaiqbal8459
    @ayeshaiqbal8459 2 роки тому

    2:33

  • @subashnayak719
    @subashnayak719 4 роки тому +1

    thank you sir

  • @emmanuelmeshuko1416
    @emmanuelmeshuko1416 3 роки тому

    Thank you sooooo much

  • @阿尔吉侬-v6b
    @阿尔吉侬-v6b 3 роки тому +1

    哈哈哈,不好好学化学就得半夜自学了TT

  • @miss.vickies
    @miss.vickies 2 роки тому

    thanks so much!!

  • @burj_knowledge
    @burj_knowledge 11 місяців тому

    Thank youuu❤

  • @andyk139
    @andyk139 3 роки тому

    I LOVE THIS

  • @henryhsil8630
    @henryhsil8630 4 роки тому

    It was wonderful thanks

  • @peddaraveedumarkapurrural8229
    @peddaraveedumarkapurrural8229 3 роки тому

    Which accent is speaker speaking? Can anyone please reply

  • @michaelkumirai7025
    @michaelkumirai7025 Місяць тому

    Why

  • @vicallday3325
    @vicallday3325 3 роки тому

    great vid

  • @jamalelouafi5985
    @jamalelouafi5985 5 років тому

    In maths, why do you not show how do we get the answer?

  • @Crystalrosety
    @Crystalrosety 4 роки тому +1

    Thank u prof. You look good btw

  • @rudeus8750
    @rudeus8750 5 місяців тому +1

    he changed his hair

  • @jetx_47
    @jetx_47 2 роки тому

    Mahna Mahna!

  • @kuntalkoley3107
    @kuntalkoley3107 5 років тому

    Let's check the blood pressure

    • @aravshah1644
      @aravshah1644 4 роки тому

      SphygmoMANOMETER... gotcha!!!!

  • @jranoco4382
    @jranoco4382 4 роки тому

    So helpful

  • @mor7510
    @mor7510 3 роки тому

    you look so good with your short hair haha

  • @manojbhardwaj5400
    @manojbhardwaj5400 5 років тому

    Please upload vedio about particle physics gauge theory plz asap

  • @TimOsman
    @TimOsman 5 років тому

    Yea but you can't have pressure without a container, it breaks the 2nd law of thermodynamics. Prove we can have pressure.
    -Nathan Oakley's message INCOMING

    • @ProfessorDaveExplains
      @ProfessorDaveExplains  5 років тому

      The atmosphere is attracted to earth due to gravity. There is nothing about this that violates thermodynamics whatsoever.

    • @TimOsman
      @TimOsman 5 років тому

      @@ProfessorDaveExplains I actually don't deny that. Flat earthers are obviously denying gravity, but bring the second law of thermodynamics in to explain the definition of gas pressure "force exerts on walls of container", so they end up saying there is a dome lol. Doesn't the second law apply to isolated systems only? What type of system is earth, it seems like sources vary.

    • @carultch
      @carultch 2 роки тому

      @@TimOsman The second law of thermodynamics applies *in general*, it is just that it is easier to explain it for isolated systems when first introducing it. So stating it in the form of "isolated systems cannot decrease in their entropy", allows us to demonstrate this with examples where half the system gains entropy, the other half decreases in entropy, and the system as a whole increases in entropy. Using an isolated system as an example, allows us to put aside entropy exchange with the surroundings, and focus on what happens in the system alone.
      The most generalized form of the second law of thermodynamics, is as follows:
      The entropy of the universe cannot decrease
      The universe is ultimately an isolated system as far as we know, so that means any entropy generated in a given process, must go somewhere, and cannot cease to exist. Entropy of the universe can remain unchanged due to the special case of a reversible process, but it cannot decrease.

    • @carultch
      @carultch 2 роки тому

      @@TimOsman Earth ultimately is an open system. The reason you get conflicting answers on this, is that for the most part, it is close enough to a closed system that you can neglect mass transfer due to whatever we gain from meteors, lose from solar wind, or lose from manmade spaceflight activity. The Earth certainly isn't an isolated system, because it gains heat from the sunlight, and radiates heat away to the cosmic background (the entire reason it cools off at night). The radiation heat transfer to the cosmic background, is what enables Earth to transfer entropy away to the rest of the universe.

  • @anilsharma-ev2my
    @anilsharma-ev2my 4 роки тому

    Put a turbine which is used in sea in this big model so we got a fresh distilled water turbine and very cheap source of energy for free

  • @anilkumarsharma8901
    @anilkumarsharma8901 2 роки тому

    Make a barometer holding one crore litres of💧💧💧 water💧💦 so it's become a great👍 source of🔌 energy⚡⚡⚡⚡ forever😁😁😁😁

  • @anilkumarsharma8901
    @anilkumarsharma8901 2 роки тому

    One crore litres volume barometer produced how much pressure for making electric🔌⚡ power💪⚡ forever😁😁😁

  • @anilkumarsharma8901
    @anilkumarsharma8901 2 роки тому

    If we used one crore manometer and a common output for all of them so it's become a great source for energy⚡ or not 🤣🤣🤣🤣

  • @rawansami4435
    @rawansami4435 4 роки тому

    Hi layan😂💜💜

    • @layan2444
      @layan2444 4 роки тому

      Heyyy rawan😂😂

    • @rawansami4435
      @rawansami4435 4 роки тому

      Layanz charmz hi hru??😂💜💜

    • @layan2444
      @layan2444 4 роки тому

      BTS Forever not that good,bcs we have physics in like 5 minutes

    • @rawansami4435
      @rawansami4435 4 роки тому

      Layanz charmz yeah me too I’m not happy

  • @markedwards5289
    @markedwards5289 5 років тому +1

    Thank you for sharing this great explanation
    I know a few flattards that need to learn about this stuff lol

    • @MrUnit731
      @MrUnit731 5 років тому +1

      Wow. Do you really know someone like that? I had a feeling they were not real. Like god or something.

  • @jasminefitzsimons896
    @jasminefitzsimons896 2 роки тому

    ILOVEU

  • @rassimsimou1594
    @rassimsimou1594 10 місяців тому

    G😊😊d

  • @LegallyMaking
    @LegallyMaking Рік тому

    Gugugaga

  • @RahmanAdekunle-qz6ud
    @RahmanAdekunle-qz6ud Рік тому

    Gteat🎉