SCIENCE CLASS #1- WHY Does Helium Make Your Voice Higher?

23 mar 2020
1 940 889 Skatījumi

Live stream with demos your brain will enjoy where we answer a basic question every time.
Does farting make you weigh more or less?!?! Place your guess and give me feedback too-


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  • im bout to do my 10th grade exams i saw the first clue and knew what it was. can i just say im very proud of myself :")

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  • this is real science

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  • The balance between a five year old and a PhD is a five and a half year old. Change my mind.

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  • I’ve been an Architect for 20 years and have loved everything about science my entire life. I had NEVER had someone explain why helium makes your voice higher! I found myself smiling at that “Eureka” moment. My 16 year old son loves everything you’ve ever done and I’m glued to my screen every video as well. Keep up your enthusiasm; it’s addictive.

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  • This is the first time I listen to class

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  • To all scientist If anyone has a class with mark rover Make me trade lives with them

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  • A simple explanation: Sound, is air vibrations that your eardrums hear. Sound is slower than the speed of light, and if anything exceeds the speed of sound, it creates a sonic boom. Your vocal chords create vibrations that create air vibrations to bump into molecules. Helium makes your vocal chords easier to move, making it high pitch. Sulfur hexafluoride makes the vocal chords move slower, making it lower pitched.

    Seoyool LeeSeoyool LeePirms 8 dienām
  • hey what you're doing ! Respect the class please

    Arif ZamriArif ZamriPirms 9 dienām
  • I'd be lucky if my teacher in science physics is you but dang I live in ph

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  • 7:30 "There's no fluid" Flap flap 😂😂😂

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  • Why do you have to wait for a qualification? İf anything they have to check how overqualified you are

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  • Mark: through your computer or phone Me who's watching on an ipad: ;-; why to I exist

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  • I don’t think this is correct. Your vocal cords vibrate at the same frequency for all 3 gasses. The reason your voice is higher with helium is because the speed of sound is faster through that gas due to its lower density (and similar compressibility) than air. This changes the resonances of your vocal tract by making it more responsive to high-frequency sounds, so the low parts of your voice are still there, they’re just not as prevalent as the higher pitch ones with the helium. Someone please correct me if I’m wrong though, this is just what was taught to me in physics.

    Lucky 360Lucky 360Pirms 10 dienām
  • i luv u mark rova

    Flavio GoetzFlavio GoetzPirms 10 dienām
  • "we're live" -Mark Rova 2021

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  • You are the Keanu Reeves of physics. My daughter loves you and your videos and for that I thank you.

    adam kingadam kingPirms 11 dienām
  • Does that mean that speaking with the sulfur gas would be harder? And speaking with the helium gas would be even easier than talking normally? Someone answer lol

    Prem ParekhPrem ParekhPirms 11 dienām
  • Ur the ONLY one who I would watch teaching physics 1 like = 1 person that agrees

    ting durransting durransPirms 12 dienām
  • I love how many times Mr . rober kept saying “we’re live”

    ting durransting durransPirms 12 dienām
  • *pre Donald Trump* Americans: "MERICA!! YEEAH" *after Trump* Americans: 17:33 .........merica..

    ChuckChuckPirms 13 dienām
  • Like breathing in sulllffuuuuuuuuuuuuuur

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  • Mark: my dream job was to be a highschool teacher Also mark: doesn't like public speaking

    Dreanne MusicDreanne MusicPirms 13 dienām
  • helium is lighter than air

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  • Ty from Dude Perfect sucked in sulfur hexafluoride for DP's 2019 tour Cool Not Cool!

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  • Left the mouse on the screen when playing a video like any teacher would.

    Michael DombroskieMichael DombroskiePirms 15 dienām
  • Never been interested in this things, just curious BUT I love how this guy explains! I’ll be here if he drops more classes :)

    Verzo MusicVerzo MusicPirms 15 dienām
  • I love how ppl with high voices actually have stronger muscles than ppl with low voices

    Eli AdestEli AdestPirms 16 dienām
    • I'll ignore the fact it's just vocal cords

      Eli AdestEli AdestPirms 16 dienām
  • Wait... in 10:02 he says that oil is heavier than water and it sinks. But is should not be exactly the opposite ?

    Si CiSi CiPirms 17 dienām
  • I'm watching this while I'm taking science class

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  • Pls

    mrwolf FNmrwolf FNPirms 17 dienām
  • Watching science while in online science class while doing a science test...bruh.

    MENTOMENTOPirms 19 dienām
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  • 13:47 a moment of silence for headphone users...

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  • Dude I wish u was my teacher

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  • I got so interested even though i hate science.He is a great teacher

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  • Who else misses these videos?

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  • I love his enthusiasm

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  • As a Christian, it hurt to hear him say the Big Bang is real

    Kyle PolsonKyle PolsonPirms 24 dienām
    • @Arctic actually, a lot of us don’t

      Kyle PolsonKyle PolsonPirms 13 dienām
    • christians believe the big bang is real...

      ArcticArcticPirms 13 dienām
  • He's so nice! And heck! I could understand!

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  • I have been enlightened

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  • It was cool

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  • 0:49 this is how kidnappers sound like on a phone call

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  • Wish I would of had you as an instructor. Entertaining and enlightening.

    sue Hullsue HullPirms Mēneša
  • My school does not tech this in junior high idk about high school but keep up the good work

    Your McNuggetYour McNuggetPirms Mēneša
  • This is the only class I will accept

    The Charred OneThe Charred OnePirms Mēneša
  • Did my man just pour invisible gas into a beaker a just light off a fire with it. Now that's insane!!

    Hudhayfah FaizHudhayfah FaizPirms Mēneša
  • Plz start these again......This is great

  • i understand it now kinda well i think i know the most of it thanks

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  • I am in Sri Lanka but I don't care

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  • Mark, I love your classes 😊😊🎆🎆🎉🎉

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  • this is much better than my science 🧪 class

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  • It is awesome

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  • Why would 1.1 k people dislike this

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  • I'm having a science class while in math class. I'm paying attention to Mark, not my math teacher.

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  • I wish you were my physics teacher. I wouldn't have failed.

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  • Lol Mr beast and Chandler 😂😂

    Aneeka AnwarAneeka AnwarPirms Mēneša
  • I liked the fact I knew most of this but I didn't put 2 and 2 together (at like 35 mins was an "ohhh" moment) - I'm a gcse student, anyway thanks I also dislike public speaking 😊

    Aneeka AnwarAneeka AnwarPirms Mēneša
  • @ 13:40 rip headphones users

    Dinesh MehtaDinesh MehtaPirms Mēneša
  • i love this channel

    Sebastian OrtizSebastian OrtizPirms Mēneša
  • How do I make my voice deeper without that sulfur? Cause Im a teen and I sound like a nine your old.

    Noah MillsNoah MillsPirms Mēneša
  • The fact that I already knew this, and he still managed to engage me and blow my mind really says something

    Adam PickardAdam PickardPirms Mēneša
  • Xenon and krypton(and argon) make your voice go lower(radon is toxic and radioacive)

    Dhananjay SawantDhananjay SawantPirms Mēneša
  • Please make more Mark. This is excellent for lockdown 🇬🇧

    Phil SPhil SPirms Mēneša
  • Who feels like he needs to be a physics teacher, I’m new so I don’t know if he already is.

    Nicholas BensonNicholas BensonPirms Mēneša
  • Everyone's wish is to have a teacher like him🔥💯

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  • me watching physics to help me sleep: marks air horn: HRRRRRRRRRRRRRR

    blubluPirms Mēneša
  • bro i wanna do science my least favorite subject besides social studies

    Mr.NoobloxMr.NoobloxPirms Mēneša
  • So i assume hydrogen would make it go higher, but is a little unsafe because its not a noble element...

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  • Mark CASUAlly becoming a teacher

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  • Love from India you are so great

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  • I’m in elementary school BUT WHO CARES

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  • It would be nice if youd try to implement SI units in your explanations. Otherwise I really enjoy these classes.

    Ferenc SterkensFerenc SterkensPirms 2 Mēnešiem
  • you trash

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  • this reminds me of Zoom (PBS Kids), thank you so much!!!

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  • Please never stop

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  • I want way more classes

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  • OMG If I had ONLY had a Physics teacher who was this much fun...

    Michele GodlevskiMichele GodlevskiPirms 2 Mēnešiem
  • 10:03 You just accidentally said the inverse of what's true, Water is heavier than Oil. Ofcourse not a big deal but you could correct it in the subtitles.

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  • Mark Rober talking about how he is talking while talking. Mind Blown

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  • If Mark was my science teacher, I would never fall asleep

    MohammadMohammadPirms 2 Mēnešiem
  • OK so the big bang never happened God created everything Mark Rober you are very smart and I feel that you should know that God created everything.

    Gavin WeltonGavin WeltonPirms 2 Mēnešiem
  • I came back to this because I got my hands on a helium ballon and almost passed out taking the whole thing :)

    im boredim boredPirms 2 Mēnešiem
  • Cool tip the quicker after the lightning the thunder is the closer it is

    Cat-Man 369Cat-Man 369Pirms 2 Mēnešiem
  • Pls be my teacher!!!!!!

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  • 100% not clickbate

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  • I’m 10 and I under stand every single bit of this video

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  • @Mark Rober, can you please make a video explaining rotational kinematics 🙏🙏

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  • If he is my science teacher I will be a topper

  • Why do you reflect when you look at a mirrror?

    Amairany PardoAmairany PardoPirms 2 Mēnešiem
  • “Teaching HS Physics is my dream job” ..... I am failing Physics right now, not because I don’t like it but because my teacher *sigh* just isn’t the best. I would absolutely just love it if you were my Physics teacher. If that could happen in some alternate universe, you would make me the happiest person ever. Your videos are the reason I’m not giving up on Physics. Seeing your videos and passion about how the world works is super inspiring and exciting:). So yes. Please become a Physics teacher. You would change so so so many students lives. Best of wishes as you pursue getting certified and all that:).

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  • Ngl this is a great idea I can’t believe I wasn’t here for it live

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  • Science was one of my weakest subjects in school, but as soon as you revealed clue 3, I had an aha! moment😃

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  • watched this on double time... mind blown!

    Steven ScottSteven ScottPirms 2 Mēnešiem
  • Guy who worked in NASA: Teaching high school is my dream job!

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