Equilibrium: Crash Course Chemistry #28

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  • Опубликовано: 25 июн 2024
  • In this episode of Crash Course Chemistry, Hank goes over the ideas of keeping your life balance... well, your chemical life. Equilibrium is all about balance and today Hank discusses Chemical Equilibrium, Concentration, Temperature, and Pressure. Also, he'll chat about Le Chatalier's Principle and Fritz Haber.
    Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
    Download it here for Apple Devices: apple.co/3d4eyZo
    Download it here for Android Devices: bit.ly/2SrDulJ
    --
    TABLE OF CONTENTS
    Equilibrium = Balance: 0:19
    Chemical Equilibrium: 1:25
    Le Chatalier's Principle 4:37
    Fritz Haber 5:31
    --
    Crash Course is on Patreon! You can support us directly by signing up at / crashcourse
    Want to find Crash Course elsewhere on the internet?
    Facebook - / youtubecrashcourse
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    CC Kids: / crashcoursekids

Комментарии • 1 тыс.

  • @crashcourse
    @crashcourse  4 года назад +158

    Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
    Download it here for Apple Devices: apple.co/3d4eyZo
    Download it here for Android Devices: bit.ly/2SrDulJ

    • @life42theuniverse
      @life42theuniverse 4 года назад +6

      3:52 'everything that happens in one direction happens in other direction' ... 'other direction' maybe a good name for a boy-band.

    • @asterism_s
      @asterism_s 4 года назад +3

      i know you said on every episode

  • @kalielaine2328
    @kalielaine2328 8 лет назад +4043

    The more you learn about chemistry, the more you realize what you previously knew was wrong.

  • @TheMrzippie
    @TheMrzippie 9 лет назад +2827

    I have a test about this in like 2 hours.

    • @cittykat19
      @cittykat19 8 лет назад +39

      +TheMrzippie me too, but tomorrow
      this just helped a lot

    • @theduh1011
      @theduh1011 8 лет назад +89

      College final in 20 minutes :(

    • @PhuongTran-yq8mj
      @PhuongTran-yq8mj 8 лет назад +10

      +theduh1011 How did you do?

    • @theduh1011
      @theduh1011 8 лет назад +59

      Phuong Tran I got a B somehow, so I guess it all worked out well in the end!

    • @PhuongTran-yq8mj
      @PhuongTran-yq8mj 8 лет назад +3

      +theduh1011 That's great. This also helped me for my final yesterday.

  • @clairefagan7597
    @clairefagan7597 9 лет назад +1558

    You know you're screwed when not even Hank Green can help you

    • @arhmlmao
      @arhmlmao 5 лет назад +46

      true words have never been spoken before mate.

    • @josephharding9795
      @josephharding9795 5 лет назад +43

      Good thing we never truly get screwed then bc I feel like Hank brings us back from the brink of failure no matter what

    • @georgedestino4788
      @georgedestino4788 4 года назад +15

      I read this as Tom Hanks

  • @willbanyard3480
    @willbanyard3480 8 лет назад +959

    Cramming for chemistry tomorrow?

    • @flow1465
      @flow1465 7 лет назад +6

      Science is the only subject which allows you to use your imagination, don't spoil it by cramming.

    • @rockercaterrorencountered4924
      @rockercaterrorencountered4924 7 лет назад +45

      Science is the only subject that allows you to use your imagination? What about English? Art? I like science as much as the next guy, but that statement was more than a bit off.

    • @elainewei309
      @elainewei309 5 лет назад +1

      You know me too well

    • @firstdictonary
      @firstdictonary 5 лет назад +1

      Cramming for the Final.

    • @Hudaaaaaaaaaaa
      @Hudaaaaaaaaaaa 5 лет назад

      For my final exam... pray for me

  • @KodiaxeMusic
    @KodiaxeMusic 5 лет назад +781

    "Perfectly balanced, as all things should be." -Thanos

    • @leewalden3061
      @leewalden3061 5 лет назад +11

      the beginning of this video is actually infinity war. lmao

    • @whitneykaye
      @whitneykaye 4 года назад +14

      Thanos is a master chemist

  • @PaulCharvet
    @PaulCharvet 10 лет назад +200

    I love how Hank slips in philosophical life advice while ostensibly talking about science. -- "Equilibrium isn’t about staying the same all the time; it’s just about keeping your balance as your circumstances change."

  • @hanzycake
    @hanzycake 7 лет назад +565

    You guys are the only reason I'm not failing most of my classes...

  • @xBustedHeart
    @xBustedHeart 8 лет назад +272

    Man you just saved me from putting a lot of shit answers in my exam.

  • @innocentboyzthegreat
    @innocentboyzthegreat 10 лет назад +289

    Jokes on you Chem quiz, this RUclips channel exists.

  • @AwesomeSpyro
    @AwesomeSpyro 8 лет назад +100

    I'm doing A Level chemistry and my teacher rushes through the topics so fast that a lot of it just goes straight over my head. Here its all covered in one 10 minute video. This is simply golden. Thank you so much Hank. I really needed this :D

  • @SofeaAmizi
    @SofeaAmizi 9 лет назад +186

    God bless your kind soul, Hank Green. I needed this.

  • @ximenam.9236
    @ximenam.9236 5 лет назад +14

    I love how I'm cramming for a chem 2 test tomorrow and I'm focused, then he says one direction and in the corner of the screen is a one direction concert going on, now there is a concert in my brain.

  • @VarshiPyndanna
    @VarshiPyndanna 8 лет назад +31

    Dear Crash course, I'm in my final year of schooling and I'm actually not sure when exactly I started to watch these videos but y'all have been incredibly helpful throughout my years of school. From the bottom of my heart, thank you so very much ❤️

  • @anxiousartist7401
    @anxiousartist7401 4 года назад +1400

    who else is here because of corona-issued online school!

  • @LucyOswinSpence
    @LucyOswinSpence 10 лет назад +36

    My teacher spent around 4 lessons trying to explain this to me and she still failed, you've done it in ten minutes! Thanks guys!!! :D

  • @aprilsonline
    @aprilsonline 4 года назад +36

    A quote from chemistry that pertains to lived life: "Equilibrium isn't about staying the same all the time; it's just about keeping your balance as your circumstances change."

  • @johnweasly8915
    @johnweasly8915 5 лет назад +235

    Lol, who’s here because they have an chemistry/science exam?

  • @chelleloreto
    @chelleloreto 6 лет назад +17

    I let myself get so behind on Chemistry lectures at uni that I'm now basically teaching myself 4 weeks' worth of content lol. Thanks so much for your videos, guys, here's hoping I get through the exam in a month's time cos right now I wouldn't understand most of it!

  • @rainyxyz
    @rainyxyz 9 лет назад +435

    watching crash course chemistry 4 hours before my chemistry exam ~_~ heh

    • @PrimadonnaGirl95
      @PrimadonnaGirl95 9 лет назад +3

      Hope your passed :D

    • @rainyxyz
      @rainyxyz 9 лет назад +6

      ***** thank you! i have another one tomorrow hahahaha

    • @lorddio2572
      @lorddio2572 9 лет назад

      samieuu
      bet that stanks bigtime

    • @prakharlondhe3876
      @prakharlondhe3876 9 лет назад +1

      ***** away????? :P ;)... juzt joking sammieuu :D

    • @firstlygaming
      @firstlygaming 9 лет назад +1

      I'm doing the same right now XD

  • @UmarTahir
    @UmarTahir 9 лет назад +29

    It was the greatest day of my life when my Chemistry teacher showed us a lesson from my favorite youtube series. So awesome.

  • @2berrykool
    @2berrykool 9 лет назад +57

    seriously thank you for your videos I got an 88 on my last exam where the average was at a 68...
    next exam t-minus 2 weeks and final the week after

    • @twaal22
      @twaal22 9 лет назад +4

      Wish you the best!

  • @khhtutor
    @khhtutor 4 года назад +11

    Applause and applause.
    SAT chem teacher from Taiwan🇹🇼

  • @Avoug
    @Avoug 8 лет назад +31

    When you think he already explained everything there is to be explained, but it turns out to be just the intro :')

  • @sanahita9678
    @sanahita9678 9 лет назад +30

    I have a major Chem. mock test tomorrow, and I'm resorting to these videos as my final study session! xP

  • @GabeNewellDFTBA
    @GabeNewellDFTBA 9 лет назад +16

    That part where Muldoon from Jurassic Park got wrecked by Predator was funny. Thank's hank.

  • @alyssaalcantara6739
    @alyssaalcantara6739 6 лет назад +10

    I love learning while being entertained by his creative analogies ☺️

  • @alyssan6800
    @alyssan6800 9 лет назад +9

    Hey Hank, you know what would be awesome? If you could do a series on Physics *insert excitement*. Your chemistry videos have helped me so much!

  • @22453790
    @22453790 10 лет назад +4

    This cannot have come at a better time. I have a chemistry test on equilibrium tomorrow. Thanks soo much crashcourse

  • @sherripy3932
    @sherripy3932 10 лет назад +3

    I swear it is not even funny how much your videos are helping me with my chemistry class. I'm studying for my last test (tomorrow) and looking over the homework packet(which i did not do) i realized that I know absolutely NOTHING!!! But watching these videos make everything a LOT easier! I cannot thank you enough for making these videos! I am so grateful to you!

  • @shirubionicle
    @shirubionicle 8 лет назад +191

    why isn't there a crash course physics channel?? this is a question ive been asking since da beginning of time XD.

    • @JTan-wu7wg
      @JTan-wu7wg 8 лет назад +7

      +Shriram Raveendran
      Don't know. Probably because CrashCourse tries to fit everything in around ten minutes. Physics, I assume, needs more time than around ten minutes.

    • @JTan-wu7wg
      @JTan-wu7wg 8 лет назад +12

      Gunbnelch Maui
      Yea. I'd usually watch CrashCourse in junction with Khan Academy and Bozeman Science.

    • @shereitograce7844
      @shereitograce7844 8 лет назад +1

      +Shriram Raveendran I would totally watch that so hard.

    • @airro3672
      @airro3672 8 лет назад +10

      Physics = Brightstorm. Chemistry = Crash Course. Biology = Bozeman

    • @arousedsquirrel2429
      @arousedsquirrel2429 8 лет назад +2

      +Gunbnelch Maui Khan could explain what he waists 10 minutes on, in at least half that time.

  • @ttam809
    @ttam809 8 лет назад +241

    AP CHEM STUDY PARTY 2k16

    • @ttam809
      @ttam809 8 лет назад +3

      Well, it was worse than the AP gov exam...

    • @limeducky0209
      @limeducky0209 8 лет назад +6

      +ttam 809 hah try IB chem

    • @learival1912
      @learival1912 8 лет назад +1

      Try EB chem -_- , at least you guys have textbooks

    • @BottleofDreamswastaken
      @BottleofDreamswastaken 7 лет назад

      SL or HL? :D

    • @vanessaa.2130
      @vanessaa.2130 5 лет назад

      How difficult is ap chemistry? I was going to do physics, but I'm not sure.

  • @talhotbrunnette123
    @talhotbrunnette123 9 лет назад +22

    I love this guy, totally saving me on these damn conceptual questions on the exams. Thanks friend

  • @kashshk845
    @kashshk845 6 лет назад +4

    i love how im casually revising, watching crash course to actually understand chemistry and then obviously ONE DIRECTION, why dont them lads leave me for a second to focus IM SHOOK

  • @pete8420
    @pete8420 5 лет назад +3

    Thank you for your videos! My chem/bio teacher left my school and was replaced by a teacher that doesn't appreciate those who have more visual and pattern thinking minds, so I'm glad I can still pay attention to these.

  • @waynasattar2991
    @waynasattar2991 5 лет назад +1

    So much to say:
    1) I love how there's a variety of classes on Crash Course.
    2) Bless Hank for making me less stressed with all the sarcasm and light jokes. I love how he does that.
    3) A request: Could you please do a video on the Contact Process for manufacturing Sulfuric Acid?
    THANK YOU

  • @PowerWillful
    @PowerWillful 6 лет назад +4

    Fun isn't something one considers when balancing the universe.
    But this... does put a smile on my face.

  • @rachaeldaley8173
    @rachaeldaley8173 8 лет назад +4

    This is the best equilibrium video, I have a Chem test tomorrow and trust me I was so confused. Good Job as usual guys!!

  • @grantdirienzo9965
    @grantdirienzo9965 5 лет назад +1

    I knew the textbook answer for how pressure effects equilibrium, but seeing it in your animation made it actually make sense to me. Thank you!

  • @wulf4785
    @wulf4785 5 лет назад +3

    I cannot stress how much of a help this video and channel are to my grades and life. I could not make AP Chem possible without this content thank you so much!

  • @quintoncraig9299
    @quintoncraig9299 6 лет назад +3

    I forgot this channel ever existed, I loved you guys.
    I still love you guys, I just forgot you were on youtube...

  • @R0ck4x3
    @R0ck4x3 10 лет назад +3

    I love watching these videos, so many nerdy references in the little animations, like the Predator in the intro to this video.

  • @SuperSox97
    @SuperSox97 10 лет назад +1

    I applaud you two for having a debate so intelligent and devoid of hostility. I found it very interesting to read through it, and I'm glad to know that there are people on the internet that can intelligently discuss subjects (especially ones like global warming and starvation) without raging at each other.

  • @blakeb4490
    @blakeb4490 5 лет назад +2

    Honors chem final in 2 days. I have watched like 20 episodes over the past weekend

  • @feeltheshadow6959
    @feeltheshadow6959 7 лет назад +77

    Did anyone think about making a whatsapp group before about chemistry exams?
    u know to help each other out

  • @sydneypage6447
    @sydneypage6447 4 года назад +3

    Theres def gonna be a big equilibrium problem on the ap exam so im here 3 hrs before it!!

  • @RabiRose
    @RabiRose 6 лет назад +1

    Hank, I love that you consistently seem to have what I'm looking for

  • @bestenoyan4128
    @bestenoyan4128 7 лет назад +4

    Love Crash Course Chemistry! Very helpful and very intriguing

  • @sebastianwilde7415
    @sebastianwilde7415 5 лет назад +55

    Thanos be like: Perfectly balanced as all things should be.

  • @ansonchin5674
    @ansonchin5674 8 лет назад +145

    AP Chemistry tomorrow anyone feel me...

    • @Asilts
      @Asilts 8 лет назад +13

      D-day is upon us

    • @PhotoEdgic
      @PhotoEdgic 8 лет назад +2

      +Anson Chin Really not looking forward to this.

    • @aadi.p4159
      @aadi.p4159 6 лет назад +1

      boii u dont even knw. my exams make me wish i was in AP chem

    • @juneltulalian866
      @juneltulalian866 6 лет назад +3

      Anson Chin actually I got chem IB

  • @atusnae
    @atusnae 10 лет назад +1

    This has helped me so much, I have been completely baffled by equilibrium until now. Thank you Hank!

  • @tacos394
    @tacos394 10 лет назад +8

    Oh hank, thank goodness crash course exists :) I love this so much!

  • @andyablett1466
    @andyablett1466 10 лет назад +6

    Fantastic job team Crash Course... you guys continuously make highly informative yet fun videos!

  • @arathisuraj856
    @arathisuraj856 10 лет назад +6

    Love this channel! I am thirteen years old and I can understand everything!!

  • @RedRaven95
    @RedRaven95 5 лет назад

    Wow, this video literally explained how equilibrium works without confusing me. This video is going to help me write my discussion essay for "Separation of Cations". Thank you!

  • @keeleybreklyn
    @keeleybreklyn 10 лет назад +2

    You guys are wonderful! I always watch Crash Course to help understand my online classes! Thank you! (:

  • @jackburns3618
    @jackburns3618 9 лет назад +5

    Hank, don you know what we do with liars in chemistry 2:55

  • @tanzilzubairbinzaman8711
    @tanzilzubairbinzaman8711 5 лет назад +9

    Is is bad that the only thing going through my head is that Thanos would _love_ this class?

  • @DannyandPatty
    @DannyandPatty 10 лет назад

    6:12 'Fritz is a fry shop in Vancouver, BC.' I got excited at that point. Thanks for mentioning us Hank!

  • @CanduPalacios397
    @CanduPalacios397 7 лет назад +1

    You guys have saved me so many times, and you continue to do it. I don't know how I could ever thank you enough.

    • @aasthasharma3820
      @aasthasharma3820 7 лет назад +2

      subscribe? like? donate monthly on their patreon page? subscribe to their other channels? like other videos? donate monthly on their other patreon pages?

  • @stephbatomalaque1859
    @stephbatomalaque1859 9 лет назад +3

    I will consider you as my online chemistry teacher. Thank you sire :D

  • @ECARaviRamyaSree
    @ECARaviRamyaSree 4 года назад +5

    Dat one direction reference tho

  • @nikithap8
    @nikithap8 7 лет назад

    The way you described pressure's effect made so much sense!! Thank God for this channel

    • @_ashyou
      @_ashyou 7 лет назад

      Nikitha P. Me too found these all videos helpful, For math I watch on mathbff it is great channel too!

  • @ImAmazing1397
    @ImAmazing1397 10 лет назад +1

    thank you Hank!! This is a great revision resource :)

  • @daviddibari812
    @daviddibari812 10 лет назад +6

    Where has this been all my life

    • @DefeatBean
      @DefeatBean 10 лет назад +2

      In a cupboard, under some stairs.

    • @ninjabreadgirl
      @ninjabreadgirl 10 лет назад +4

      this video is Harry Potter?

  • @arathisuraj856
    @arathisuraj856 10 лет назад +6

    Hank, what do we do with liars in chemistry?
    As you nicely put it, we kill them. Right, Hank?

  • @SusieeeeeeQ
    @SusieeeeeeQ 9 лет назад +1

    thank you so much! i did not understand this at all and now I GET IT!! who needs school when you have youtube?

  • @johnobrien5464
    @johnobrien5464 8 лет назад

    This reminded me of when I was in chemistry class and they began to say how everything that we he previously learned was wrong or at least different to what we had learned in the more general science classes we had had before.
    Also I had a student teacher that did that reaction and showed us Crash Course

  • @leewalden3061
    @leewalden3061 5 лет назад +6

    This video inspired Thanos. Congrats Hank.

  • @dantea.1877
    @dantea.1877 9 лет назад +3

    Men... this videos ARE GREAT!!!!!! THANKS!!!.... and please... keep doing it!!!!.... also, I enjoy the biology ones too!!

  • @ho0rselo0ver15
    @ho0rselo0ver15 10 лет назад

    THANK YOU! You just helped me answer most of the questions in my homework!

  • @jesse5052
    @jesse5052 8 лет назад

    I have watched this video so many times now over the last 2 years. I didn't really notice until I came in and knew exactly what the first two sentences were before he had even finished them :)

  • @Mangoroni_7
    @Mangoroni_7 8 лет назад +82

    So...does Hank's shirt say energy or nerd?

  • @yokkaofightteam
    @yokkaofightteam 9 лет назад +24

    Is he hinting that he supports Liverpool? :DDDD

  • @mohammadbahri4832
    @mohammadbahri4832 6 лет назад +1

    Man this channel is really amazing i have just started watching and it's really a fun and an easy way to learn
    Cant be more thanksful💞💞💞

  • @yarriamapirate
    @yarriamapirate 9 лет назад +1

    you are SAVING MY LIFE dude. metaphorically.

  • @coldweatherart
    @coldweatherart 9 лет назад +15

    Watching this video is way better than reading a textbook. I should get rid of my textbook in favour of these videos XD

  • @faithpatterson2721
    @faithpatterson2721 4 года назад +3

    How was the AP Chem exam?

  • @helloelsie
    @helloelsie 10 лет назад +2

    Thank you so much omg. I have a test tmr and i learn better watching your videos than class....

  • @UgoMazier1704
    @UgoMazier1704 8 лет назад +1

    Man you're awesome !! Thank's so much for making this video !

  • @llmagruder1
    @llmagruder1 5 лет назад +5

    AP Chem 2019 !!

    • @novanotfoundyt
      @novanotfoundyt 4 года назад

      M M why are everybody in ap watching this I’m in regular class and my teacher is making us watch this

  • @apsanders9359
    @apsanders9359 7 лет назад +3

    Thanks for the video and all the other awesome videos! However, there is an issue with the concentration vs time graph around 3:15. The change in concentration should be the same as the stoichiometry ratios. I realise the y-axis has no scale but I think it is still a relative scale and probably needs to reflect the 1:3:2 ratio of the equilibrium equation.

  • @Angelamica7253
    @Angelamica7253 10 лет назад

    Ugh thank you!! We performed all four parts of that last reaction, and my lab instructor had almost no idea as to how the reaction worked :c Now I can explain why we observed those certain color changes c:

  • @AsifAli-yg8kc
    @AsifAli-yg8kc 6 лет назад

    had wasted years understanding this in class but now... its like crystal clear..love yáll.

  • @JulieGilbert
    @JulieGilbert 10 лет назад +3

    Great Video. You should read Master Mind (The Rise and Fall of Fritz Haber, The Nobel Laureate Who Lunched the Age of Chemical Warfare). A very interesting book.

  • @tourmaline2228
    @tourmaline2228 4 года назад +5

    when you have a online test in less than 30 min and crash course is your only hope =]

  • @gnoble43
    @gnoble43 10 лет назад

    So glad that there's a video about this! We just did this in biology and I was so confused!

  • @Kiyodio
    @Kiyodio 6 лет назад +1

    I have a GCSE Chemistry exam tomorrow, this isnt for our specification but its helped so much already than the people i already watch

  • @videoeffectstutor
    @videoeffectstutor 10 лет назад +5

    1 direction @3:50 HA!

  • @IulianusTabernarius
    @IulianusTabernarius 9 лет назад +3

    I just now realized the predator reference.

  • @TheReMorseCode
    @TheReMorseCode 4 года назад +2

    Thank you Hank I love your hand gestures and of course your blazer but what I love most of all is your zest for life. As I lay in my bed on the verge of tears before exams you’re the only man on this hell website that does not make me want to put myself in a forever coma and drift into the bay letting seagulls destroy my bloated corpse

    • @miaeriu
      @miaeriu 4 года назад +1

      literally same

  • @Ray-ye8gz
    @Ray-ye8gz 7 лет назад

    Equilibrium, a thing that I never understood and didn't think I will! XD Thank you Hank Green!

  • @remittri
    @remittri 8 лет назад +3

    gonna watch these videos properly in the summer when I dont have an excuse for skipping 90% of the videos since Im only on GCSE

    • @meows6811
      @meows6811 8 лет назад

      same my exam is today rip

    • @remittri
      @remittri 8 лет назад

      +9m_amara I hope it went well? xD

    • @meows6811
      @meows6811 8 лет назад

      +AppleEncore i just got home. The first paper was great then the second was ok. Fortunately the haber process came up

    • @remittri
      @remittri 8 лет назад

      +9m_amara Yeah same for me. All that quantitative chemistry revision for such a simple calculation to come up!

    • @meows6811
      @meows6811 8 лет назад

      +AppleEncore rightt. I revised the titration calculations too :(

  • @iarlegend
    @iarlegend 10 лет назад +3

    I liked the Liverpool outfits xD

  • @awesomesheen
    @awesomesheen 10 лет назад +1

    Equilibrium was one of my most favorite topics in AP Chem!

  • @nympseudonym6990
    @nympseudonym6990 8 лет назад +1

    THANK YOU. I love your chem videos. They help me so much ;~;

  • @seamie6644
    @seamie6644 9 лет назад +3

    Well, Hank talked about pressure and temperature can change the side of the equilibrium reaction, so how about volume? does it affect too?

    • @alysiastringer5610
      @alysiastringer5610 9 лет назад +2

      volume is the same as concentration which he discusses at the start...

    • @GhastlyDesigns
      @GhastlyDesigns 9 лет назад +6

      NIGIHAYAMI Kohaku Nushi Pressure and volume are inversely proportional according to Boyles law (Decrease volume, increase pressure). If you decrease the volume, it's expected there will be more collisions between the particles and the wall of the container. Therefore it will increase the pressure within the container making the system favour the reaction with less particles to get back to equilibrium. It's also good to note that concentration is directly proportional to pressure, so if the pressure increases; so will the concentration...and volume will decrease (because it's inversely proportional to pressure). :)

    • @seamie6644
      @seamie6644 9 лет назад +2

      GhastlyDesigns how can I forget about Boyle's? So stupid of me! Thanks anyway :)

    • @GhastlyDesigns
      @GhastlyDesigns 9 лет назад

      No worries :3

  • @kylelow1955
    @kylelow1955 9 лет назад +3

    :D nice videos

  • @RodeyMcG
    @RodeyMcG 10 лет назад

    I love the Thought-bubble-John cameo at the beginning. And with Thought-bubble-Henry! :)

  • @guruprasadarupathumuvar3580
    @guruprasadarupathumuvar3580 Год назад

    I wish I had a teacher like him...he makes the concept more interesting