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Hydrogen - Periodic Table of Videos 

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We've updated our hydrogen video by exploding a bigger and better balloon. But what creates the fireball?
More links in description below ↓↓↓
Support Periodic Videos on Patreon: / periodicvideos
A video on every element: bit.ly/118elements
More at www.periodicvideos.com/
Follow us on Facebook at / periodicvideos
And on Twitter at / periodicvideos
From the School of Chemistry at The University of Nottingham: bit.ly/NottChem
Periodic Videos films are by video journalist Brady Haran: www.bradyharanblog.com
Join Brady's mailing list for updates and extra stuff --- eepurl.com/YdjL9

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4 янв 2009

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Комментарии : 1 тыс.   
@periodicvideos
@periodicvideos 4 года назад
These videos are made by Brady Haran - check out his "Unmade Podcast" here: bit.ly/UnmadePlaylist
@LoadBearingSolder
@LoadBearingSolder 4 года назад
Does this reaction make singlet oxygen? Which would make it red i think.
@DonaldSleightholme
@DonaldSleightholme 2 года назад
i was just thinking if you mix hydrogen with co2 it might not be as reactive when it burns? 🔥🤔🤷‍♂️
@HarshitaYadav-yb5yn
@HarshitaYadav-yb5yn 8 месяцев назад
😊
@miah2011
@miah2011 8 лет назад
Is anybody else on a periodic table marathon?
@coconut123ize
@coconut123ize 8 лет назад
yes lol its like 4am here and this is the last playlist I haven't seen on this channel
@RudolfKlusal
@RudolfKlusal 8 лет назад
+Miah Nuguid Exactly :-D
@maxeyre2024
@maxeyre2024 8 лет назад
+Miah Nuguid Oh yeah!!!!!!! The periodic table is the best!!!!!!!
@serubyne57
@serubyne57 7 лет назад
Me.
@tomasdossantos4714
@tomasdossantos4714 7 лет назад
me too
@orangejoe204
@orangejoe204 5 лет назад
For those playing along at home for these 118 videos, your repeating cast of characters is: Professor Sir Martyn Poliakoff (mad, famous chemist - Oxford accent), Professor Pete License (chemist - Welsh accent), Associate Professor Deb Kays (junior chemist - cute accent), and... Neil (whose position and accent I am unable to identify, though via his age and experience he appears to be the Chief Lab Assistant or some such, though this may be a running joke). As of 2019 all three profs still work at Nottingham. There's also another younger male Professor with short hair who appears in these videos frequently, but I am unable to identify: he's got his own office so he's clearly a prof.
@jonathana.5270
@jonathana.5270 Год назад
Don't forget about Sam.
@Gmackematix
@Gmackematix Месяц назад
I'll just add that if you've ever seen a Stephen Poliakoff TV series, Professor Sir Martyn is his brother.
@colmanbaldwinson9091
@colmanbaldwinson9091 9 лет назад
The guy is the most stereotypical mad scientist I've ever seen
@Rj-tz5kb
@Rj-tz5kb 6 лет назад
And we all love him so much for it
@RoastCDuck
@RoastCDuck 6 лет назад
His hair is a tesla tower
@christophermclaughlin8899
@christophermclaughlin8899 5 лет назад
Then you should check out the late Professor Julius Sumner Miller.
@hexenacht_4662
@hexenacht_4662 4 года назад
To me, he looks like a cross of Doc Brown (Back to the future) and Einstein...Love it!
@adolfsnape1481
@adolfsnape1481 4 года назад
I prefer Hououin Kyouma
@teagansmith3326
@teagansmith3326 9 лет назад
LOL when he detonated it, someone was walking by behind the treeline, and they stopped and looked around
@NN-zj2jq
@NN-zj2jq 8 лет назад
Yeah i saw that too... It was funny
@themonkeyhand
@themonkeyhand 8 лет назад
+Teagan Smith A chemistry creeper
@teagansmith3326
@teagansmith3326 8 лет назад
lolololol
@raydeen1
@raydeen1 8 лет назад
+Teagan Smith Yes, the hydrogen/oxygen combo created a hole in time. What you are seeing is the grassy knoll gunman in the distance.
@danielthesantos
@danielthesantos 7 лет назад
poor kid :(
@PopeLando
@PopeLando 10 лет назад
The very first thing said at the beginning of the 118-long All The Elements playlist is... "We're braving the elements..."
@DoiInthanon1897
@DoiInthanon1897 2 года назад
And I like how the word “elements” can be read in two different contexts
@Gmackematix
@Gmackematix Месяц назад
That is made even more brilliant by it not appearing to be deliberate.
@naej3721
@naej3721 Год назад
These videos are TREASURE! I had always found chemistry boring and my brain just automatically shut down when I saw lots of chemical formulas. So I was searching for chem videos that can help me get asleep. Then I found these videos. Now an hour has passed and I am still awake enjoying these magic-like chemical reactions and knowledge. Thank you so much broadening my understanding of the world and leading me into the wonderful chemistry world!
@explorer914
@explorer914 9 лет назад
Did i just hear Neil talk?!
@michagrill9432
@michagrill9432 6 лет назад
explorer914 😂😂😂
@DoiInthanon1897
@DoiInthanon1897 3 года назад
Yep 😆
@ashlopez8221
@ashlopez8221 3 года назад
I'm so glad I found these videos! It's been more than 10 years! I'm so glad there's more amazing videos!
@connieembury1
@connieembury1 3 года назад
Love the ACME sticker on the detonator!
@erinjoyce5531
@erinjoyce5531 9 лет назад
3:10 you scared that poor dude
@U014B
@U014B 8 лет назад
SO THAT'S WHAT NEIL SOUNDS LIKE!
@axlsister5378
@axlsister5378 8 лет назад
YEAH was thinkin the same too and i finally found a video were he actually talked
@inverted1057
@inverted1057 2 года назад
@@axlsister5378 where he didn't?
@francois-xavierdessureault8039
@francois-xavierdessureault8039 2 года назад
I've watched more than a dozen video on this channel, this is the first time I've heard Neil speak :O His "silent sidekick" role is so iconic in the rest of the series that it was a little surreal to hear his voice
@nornironniall
@nornironniall 9 лет назад
I think I probably would have done better in school if I could have gone home and watch youtube videos.
@nornironniall
@nornironniall 9 лет назад
antiswattt3 Not following your logic at all
@arthas640
@arthas640 5 лет назад
I graduated school right around the time these sorts of videos started becoming common, so i just missed the opportunity. Now you can easily google this stuff or if you have problems in school you can google the questions and find explanations.
@somanytvshowshavecausedmee899
@somanytvshowshavecausedmee899 4 года назад
whats ironic is that now everyone is doing home learning
@nornironniall
@nornironniall 4 года назад
@@somanytvshowshavecausedmee899 ironic?? RU-vid and other online resources are certainly making things much easier for us.
@dax5791
@dax5791 3 года назад
Visual learner, huh? Yeah, that's rough. I'm one of the lucky ones who learns best from reading, so I used to resent having to go to lectures because I could just go home and learn from the textbook. It's a shame schools aren't flexible enough to let everybody learn the way they learn best.
@petergerdes1094
@petergerdes1094 2 года назад
excellent to finally hear Neil speak ...would love to see more of him in the videos.
@ahemadzuheb
@ahemadzuheb Год назад
Neilred?🧐
@johnjackson4105
@johnjackson4105 8 лет назад
Awesome science ;-) I wish my Chemistry teachers were more like you guys!
@oliverdiamond6594
@oliverdiamond6594 Год назад
a lot of chemistry teachers probably would be as fun as this if they were always teaching people keen to learn like you.
@dimlighty
@dimlighty Год назад
From today, I'm starting to watch one video every day from this series. 118 days for 118 elements. Let's go!
@samlill
@samlill 3 месяца назад
anyone in 2024?
@Njdhr06
@Njdhr06 2 месяца назад
Here
@VijaymalaPatil-xg7eu
@VijaymalaPatil-xg7eu 2 месяца назад
Here
@nonbinaryDes
@nonbinaryDes 2 месяца назад
:)
@interstellar3.14
@interstellar3.14 2 месяца назад
yep
@davidh6300
@davidh6300 2 месяца назад
Hello
@pneumatic
@pneumatic 11 лет назад
I'd love to have seen the reaction of the person walking in the background as they exploded the balloon!
@lucianlucian9911
@lucianlucian9911 7 лет назад
A very concentrated mixture of hydrogen and oxygen may react (or detonate) with almost no color whatsoever (UV radiations are emitted). However, in the case of low pressure hydrogen burned in air, the reddish/pink color is normal due to the Balmer series emission lines of hydrogen atoms (temperature and therefore energy dependent).
@toddcoolbaugh9978
@toddcoolbaugh9978 5 лет назад
I tend to agree with you, but I don't think it is the entire Balmer series as a hydrogen discharge lamp is purple. The lowest energy Balmer line is red. So there is just enough energy to excite to the n=3 level?
@DANGJOS
@DANGJOS 5 лет назад
Well, in our lab, hydrogen burned in air is *completely* colorless. It's actually when we mix in oxygen that the torch turns a light blue color. So I'm not sure your explanation makes sense to me. Who knows
@1mctous
@1mctous 3 года назад
A spectrum of the emitted light would answer the question.
@buca9696
@buca9696 9 лет назад
I wonder how would The Prof look with his hair tied back.
@jas2048
@jas2048 5 лет назад
He should be thinking about a new hair dresser.
@NA-yo7jq
@NA-yo7jq Год назад
Does anyone know a book that has information on all physical and chemical etc. properties of all elements on the periodic table?
@corpsiecorpsie_the_original
@corpsiecorpsie_the_original 4 года назад
People starting the playlist in 2019, check in here
@GodlovesyougiveyourlifetoChris
@GodlovesyougiveyourlifetoChris 4 года назад
Corpsie Corpsie we are here
@gr8withan8playz
@gr8withan8playz 4 года назад
Yup... Only 5 days of 2019 left
@spectreshadow
@spectreshadow 4 года назад
2020 here.
@nodnarbthegreatest
@nodnarbthegreatest 4 года назад
I'm in 2020
@parthdhadke9149
@parthdhadke9149 4 года назад
*2020
@splatproductions99
@splatproductions99 8 лет назад
Neil speaks.
@DreamVikings
@DreamVikings 10 лет назад
I used to suck at chemistry and physics back in school. Now because of my career I am really into it. I wish I had paid more attention all those years ago, chemistry and physics are awesome. Biology is awesome too but i don't really care about it so much :p
@Bilbus7
@Bilbus7 6 лет назад
wow that's sexist
@terrenmaplethorpe4001
@terrenmaplethorpe4001 6 лет назад
Don’t care about biology... don’t care about biology... why though
@louistournas120
@louistournas120 6 лет назад
Don't know much about biology, Don't know much about the french I took, But I do know that I love you and what a wonderful world it would be.
@ThatFoxxoLeo
@ThatFoxxoLeo 3 года назад
@@Bilbus7 ?
@thepumpkingking8339
@thepumpkingking8339 9 лет назад
2:24 Just Love the ACME Detonator.... Baby..
@thepumpkingking8339
@thepumpkingking8339 9 лет назад
What About the guy behind the tree's.
@NoActuallyGo-KCUF-Yourself
@NoActuallyGo-KCUF-Yourself 9 лет назад
ACME Detonator is so win!
@zidan07168
@zidan07168 3 года назад
Lol
@zidan07168
@zidan07168 3 года назад
Great
@yeadontwearitout
@yeadontwearitout 7 лет назад
3:09 guy in the background thought he got shot
@peterbriers
@peterbriers 15 лет назад
Haha, ACME on the detonator. Nice touch!
@desvlogs2352
@desvlogs2352 8 лет назад
An ultra rare audio clip featuring Neil's voice.
@mikestoneadfjgs
@mikestoneadfjgs 8 лет назад
Neil is my spirit animal.
@vinaykumar2030
@vinaykumar2030 3 года назад
lol
@stevelehel3625
@stevelehel3625 3 года назад
About the balloon burning, you can see the balloon parts move out of the way before it burns. Yes, hidrogen does give off a temperature regulated color from faint red to a bright yellow (see shuttle engines). Great stuff, thanks!!!
@TipoQueTocaelPiano
@TipoQueTocaelPiano 9 лет назад
This is what they should teach in the schools, and not all the useless stuff they currently teach. That goes for the whole series, not just for this particular video.
@michaelhogan738
@michaelhogan738 3 года назад
I love the Acme detonation switch box. Reminds me of the roadrunner cartoons! Great video!
@cr1901
@cr1901 15 лет назад
Excellent video! Combine much of what I learned in College Chemistry into a single experiment!
@Mr.Nichan
@Mr.Nichan 4 года назад
The info about fusion reactions is a little bit off: 1) Simple proton-proton fusion is possible, releases energy, and is necessary for stars to work. It is just much more difficult because it requires one of the protons to randomly turn into a neutron while the protons are extremely close to each other (and also because the electric repulsion between the two nuclei is larger compared to their masses). 2) When two deuterium nuclei fuse, the normal result is not Helium 4, but rather either "Tritium", AKA Hydrogen 3 (one proton and two neutrons), or Helium 3 (two protons and one neutron). In the former case, one of the two protons is emitted (a normal hydrogen nucleus); in the latter case, a neutron is emitted. (This neutron will either fuse with another atomic nucleus or, if it continues to fly away for a few minutes, will eventually decay into a proton and an electron.) 3) Hydrogen bombs usually use deuterium-tritium fusion, not deuterium-deuterium fusion, although that does technically also happen when they explode, as does tritium-tritium fusion, and, to a much lesser extent other types of fusion. There are also thermonuclear bombs that use lithium isotopes.
@johnopalko5223
@johnopalko5223 6 лет назад
Ignite a balloon filled with hydrogen and you get a nice WOOMPH! Fill the balloon with a mixture of hydrogen and oxygen and you get a deafening BANG! I saw a demonstration of this once. The prof used soap bubbles instead of balloons. He also popped a piece of dry ice into his mouth to see if it tasted sour, as you would expect. Quoth he, "Never do that, by the way." Strange fellow...
@botran6934
@botran6934 2 года назад
best thing to binge watch on weekend instead of netflix!
@PoznanPiatkowo
@PoznanPiatkowo 6 лет назад
I would love to see a video about metallic hydrogen.
@JayMark2049
@JayMark2049 8 лет назад
Some say the balloons are still up there.
@nou3838
@nou3838 Месяц назад
Im on my way to gather more general knowledge and seeing the full periodic table on this channel is just awesome, thanks
@adnanxafar7909
@adnanxafar7909 Год назад
That is one of the interesting RU-vid channel, I found.
@almostfm
@almostfm 5 лет назад
2:23 Acme brand detonator. Wile E. Coyote would be proud.
@zidan07168
@zidan07168 3 года назад
Yup
@ArGBR04
@ArGBR04 5 лет назад
I can't belive it's been 10 years already.
@DoiInthanon1897
@DoiInthanon1897 Год назад
14 now. Crazy how time flies.
@EzyoMusic
@EzyoMusic 14 лет назад
I'm doing a work piece on hydrogen for school now, this helped me to some things to look up about hydrogen and it's isotopes. Thanks!
@nella1033
@nella1033 4 года назад
just subscribed and im excited to watch the rest of the Chemical Elements playlist
@jetpaq
@jetpaq 9 лет назад
2:20 please tell me someone else saw that the detonator box was built by none other than "ACME" corp.. LOL im not expecting this to go well>...where the coyote when you need him? LOLOLOL
@strider04
@strider04 6 лет назад
jetpaq every ACME corp item coyote got didnt work for him because roadrunner owned ACME CORP
@FidaAifiya
@FidaAifiya 7 лет назад
it's amazing how I've lived for 19 years and only started to learn chemistry. all those years i have failed to notice the most beautiful field of knowledge.
@dweebmcbeebs
@dweebmcbeebs 4 года назад
Thank you so much for making these videos!
@RTYB
@RTYB 11 лет назад
Thank you for all of your periodic videos, they help me a lot :) Thanks for the effort, i freaking love'em :3.
@louistournas120
@louistournas120 9 лет назад
I remember filling a small balloon when I was 15. I did it downstairs. I lit it and the explosion was really loud. I felt the shock wave going through my body. Various objects were vibrating for 10 sec after it explosion.
@DorianMattar
@DorianMattar 9 лет назад
Great video
@fuppetti
@fuppetti 9 лет назад
Filling it with what?
@linklovezelda
@linklovezelda 9 лет назад
Wtf are you talking about?
@louistournas120
@louistournas120 9 лет назад
Deltaexio Hydrogen.
@KhanggiTanka
@KhanggiTanka 9 лет назад
ACME detonator HAHAHAHHAHAHAHA
@otakujome8162
@otakujome8162 9 лет назад
***** Road runner! *high fives*
@michagrill9432
@michagrill9432 8 лет назад
Why not a big weatherballon with hydrogen?😃
@KhanggiTanka
@KhanggiTanka 8 лет назад
Micha Grill because thats to obvious because thats the main focus of the video i saw something hidden or less obvious thats why i comented
@alexanderreddick7090
@alexanderreddick7090 8 лет назад
***** Simply Amazing. LOL!
@zapfanzapfan
@zapfanzapfan 4 года назад
Glad someone else also noticed that :-)
@sarachergaoui9268
@sarachergaoui9268 3 года назад
Thanks for the video, it’s informative and fun to watch!
@xxhamedxx01
@xxhamedxx01 3 года назад
Great job you did with that series of videos. thanks
@barbaic
@barbaic 7 лет назад
lol person in the background.
@gabrielbonney339
@gabrielbonney339 7 лет назад
ITS BIGFOOT! I FOUND BIGFOOT, GUYS!
@barbaic
@barbaic 7 лет назад
LOL
@boss2nine
@boss2nine 7 лет назад
Elder Galaxy 42 Messin With Sasquatch
@winnileverageoptions110
@winnileverageoptions110 7 лет назад
olumide I love this
@barbaic
@barbaic 7 лет назад
Luigi Lim Tolosa yes?
@Logic44
@Logic44 4 года назад
3:05 That bloke pissed himself
@fratercontenduntocculta8161
These videos have spectacular production quality for their age!
@TravisRepine
@TravisRepine 4 года назад
This is probably one of my fave videos cause of fun factor of the the balloon experiments, and also Neil speaks!
@JordanBergstrom
@JordanBergstrom 8 лет назад
NEIL SPEAKS!!!
@ethanboyd6885
@ethanboyd6885 7 лет назад
What I wonder is; That both Hydrogen and Oxygen, when isolated, are fuel sources for fire - so how is it that when combined to make H2O (water) they are able to extinguish a flame ?
@qwbigbrother1
@qwbigbrother1 7 лет назад
because the energy released in a typical combustion reaction isn't strong enough to break the bonds in an h2o molecule. And how water is extinguishing a flame is by reducing heat and saturating the combustion fuel source. for instance, once wood is wet, the air pockets in the wood are filled with water which as we no is not combustible with simply heat and ignition.
@cypherspaceagain
@cypherspaceagain 7 лет назад
1) The properties of a compound are usually unrelated to its components. Sodium Chloride is not a metal, nor poisonous, nor highly reactive. 2) Neither element, when *isolated* is a fuel source. Hydrogen will combust in the presence of oxygen, creating water.
@TheBritGamers
@TheBritGamers 11 лет назад
i have the same mug as him every time i have a cup of tea i try and recite the periodic table!
@Ben79k
@Ben79k 14 лет назад
I learn so much from every one of your videos. I wish you were my teacher in school :)
@4ngryGn0m3
@4ngryGn0m3 7 лет назад
you guys should work together with The SloMoGuys. the footage of u guys collaboration must be amazing!
@randomcrafts584
@randomcrafts584 6 месяцев назад
Watching this in 2024 seems amazing 😂
@spectreshadow
@spectreshadow 4 года назад
I literally just found this, so awesome!
@brandonswetland7276
@brandonswetland7276 11 лет назад
I applaud you for being able to answer his question seriously.
@kolkoki
@kolkoki 9 лет назад
Did ssomeone saw the person in the background when the balloon explode, just walking and suddently stop when it explode? :D
@Nutty151
@Nutty151 8 лет назад
I did lol.
@two2cool106
@two2cool106 7 лет назад
yea I saw him
@MediaSubliminal
@MediaSubliminal 5 лет назад
@3:09 You can see the guy in the background walking stop when the balloon pops.
@zacgrey6385
@zacgrey6385 8 лет назад
Most Awesome Playlist Idea. Im Saving It. Brilliant. i guess Other Streams Would Learn From This Playlist; Biology, ParticlePhysics etc channels. Thanks
@jonnyreverb
@jonnyreverb 7 лет назад
The "Acme" detonator box... X-D I love you guys!
@rionasera
@rionasera 8 лет назад
Hydrogen gas is the least dense substance in the world, at 0.08988g/cc. Hydrogen solid is the most dense substance in the world, at 70.6g/cc.
@JasonRudolphKruger
@JasonRudolphKruger 8 лет назад
+Riona Sera ,So all I am is solid Hydrogen , Thanks! :)
@JayMark2049
@JayMark2049 8 лет назад
+Riona Sera I don't know where you got that information but it's wrong. Solid hydrogen is the lightest solid. And the units should be g/L, not g/cc.
@BABARKhan-rf3bq
@BABARKhan-rf3bq 8 лет назад
+JayMark2049 I don't think you understood the joke....
@JayMark2049
@JayMark2049 8 лет назад
BABAR Khan No, and I still don't. lol
@starfall0
@starfall0 7 лет назад
I don't get it either
@leejuriet1013
@leejuriet1013 10 лет назад
And lol. "ACME detonator"?
@zidan07168
@zidan07168 3 года назад
Yup
@Enatbyte
@Enatbyte 12 лет назад
I like the guy walking in the background at about 3:05. He pauses for a second after the explosion and then keeps on walking.
@stuartthegrant
@stuartthegrant 15 лет назад
Stop the repeats you guys. I love this channel
@archangel1996j
@archangel1996j 9 лет назад
One down 117 to go
@dthomas8505
@dthomas8505 5 лет назад
one down... only 117 to go! It's elementary, my dear Rchangel!
@masterzane4369
@masterzane4369 7 лет назад
who's watching in 2017?
@andycaidacow
@andycaidacow 9 лет назад
Neil's voice is awesome!
@TheFakeyCakeMaker
@TheFakeyCakeMaker 6 месяцев назад
My only singular complaint about these absolutely sensational videos is that they are not numbered.
@vanadar00
@vanadar00 8 лет назад
he said "more denser" ....smh
@claymeistereu
@claymeistereu 6 лет назад
He's a scientist, not an englishmatician!
@SuriyaaKudo
@SuriyaaKudo 11 лет назад
One of the best chemistry videos on youtube! -Suriyaa Kudo
@Hawkallica
@Hawkallica 14 лет назад
You guys should invest in a super high frames per second camera when you film your experiemnts!! Thank you so much for all of your videos!!
@TempusCaelum
@TempusCaelum 15 лет назад
That's amazing, I didn't know that's how a hydrogen bomb worked. I wonder if this process could work with other elements? In any case, another very interesting video.
@matsmeulenkamp5515
@matsmeulenkamp5515 Год назад
I think it also works with helium, i think.
@connieembury1
@connieembury1 Год назад
I cannot believe it's been fourteen years already! Wow!
@SteveChisnall
@SteveChisnall 8 лет назад
Chornobyl was not a hydrogen-and-oxygen explosion, it was a steam-explosion, like when an over-pressurized water-heater explodes. Challenger wasn't a hydrogen-and-oxygen explosion until AFTER the initial explosion, which was a failure of the solid-rocket-booster seal. The last major example of a hydrogen+oxygen explosion was during Fukushima Daiichi. Before then, the most recent example of a hydrogen+oxygen explosion that I can think of would be the Hindenberg.
@EdwardTriesToScience
@EdwardTriesToScience 3 года назад
0:49 neils voice wow.
@lauren9004
@lauren9004 8 месяцев назад
Thank you for the video!
@FabledTitan
@FabledTitan 13 лет назад
Very nice. Subscribed!
@shighberg
@shighberg 4 года назад
We finally hear Niel speak!
@somedudeinva
@somedudeinva 11 лет назад
I've seen it. It's intense. And you're exactly right - it's a sharp "bang" rather than a "boom".
@selamawimedia2778
@selamawimedia2778 2 года назад
I love this experiment!
@jfr9964
@jfr9964 6 лет назад
Watching this as a learning tool for upcoming Chemistry Olympiad I know nothing about chemistry and I want to study physics, but my teacher said “You’re going to the regional round.” There is supposed to be a in-lesson experiment, so I hope I don’t blow myself up. Anyways, nice videos!
@OOZ662
@OOZ662 12 лет назад
@Nevir The mug is at the front of the desk and the ball is set toward the back. He drinks from that cup in one of the alcohol related episodes, and it's your average size coffee mug.
@charmq777
@charmq777 9 лет назад
Love his mug!
@inmeeden
@inmeeden 9 лет назад
now that is a scientist!! great vid
@ABurgess
@ABurgess 5 лет назад
I just got blindsided Pete's joke about the Welsh at 6:11.
@hfilipenk
@hfilipenk Год назад
Dmitry Ivanovich built a table according to atomic weight, and he was right, because. atomic weight characterized the element completely, so to speak. This characteristic implicitly included both the periodicity and the charge of the nucleus. But someone collected the lanthanides after him in one line and placed them below the table. And Mendeleev had cerium after lanthanum. Now after lanthanum there is hafnium, and this is a gross mistake because, according to the atomic weight, it, hafnium, should be located on the line below. Elements 72-75 and 108-111 are omitted, starting with hafnium, the charges of the nuclei have changed. After Mendeleev, the era of quantum mechanics began and its periodicity fit beautifully for many elements. Then it turned out that the main feature of the element is the charge of the nucleus. Before you is a table built according to the charges of the nuclei of atoms.
@bobnfreely
@bobnfreely 15 лет назад
My favorite demo from high school physics was when the teacher put a coffee-can full of hydrogen at the back of the classroom, with a pinhole in the top and a larger hole at the bottom. He lit the hydrogen coming out the top, and it simply burned like a candle. He then started the lecture for the day. About 5 minutes later, there was a tremendous BANG! from behind us. When the air coming in at the bottom increased the oxygen/hydrogen ratio in the can to 1:2, the reaction sped up a bit.
@OverlandOne
@OverlandOne 13 лет назад
Excellent video, thank you. Bill
@Computment
@Computment 2 года назад
10 year old 0 likes
@daisy9756
@daisy9756 2 года назад
Nice Professor!
@jerbear5212
@jerbear5212 11 лет назад
I love how its an acme detonator like they are gonna use this balloon to catch the road runner or something.
@arjunkhanna5853
@arjunkhanna5853 5 лет назад
Don't you just love Brady's channels?
@tomatzu
@tomatzu 15 лет назад
ACME Detonator! XD You can't be serious! Great vid as always!
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