How Atomic Bomb Works: Little Boy

[@jimmyhtd]

When the Uranium is hit with an neutron it splits into two smaller atoms like Krypton and Barium and releases 2-3 neutrons to strike additional Uranium atoms. It does not split into two Uranium atoms.

[@robdave1974]

Thank you, when I heard it , I was like no no no , I came to comments to type exactly what you said.

[@dastanjan320]

it always puzzled me how can a whole new atom of the same type be created if only one neutron is added. of it becomes something else (with smaller number of nucleii) then it makes senese.

[@dimitriosfromgreece4227]

🤣🤣🤣❤️❤️

[@Solkre82]

If it worked that way wouldn't the explosion never stop?

[@Beer4Breakfast]

⁠@@Solkre82 it would be like creating matter (eventually Lead metal) without fuel and that would be cool but the video representation is of course impossible

[@johno9507]

2:39 The bomb arming plugs were removed in-flight by weaponeer Captain William Sterling 'Deak' Parsons, not as the bomb was dropped. He kept them as souvenirs.

[@98pointseven]

The animation is nice, but there are numerous, very obvious errors in the narrative, e.g. the crazy idea that when the U-235 atom is hit with a neutron it produces two more U-235 atoms. Yet this has been posted for months and nobody has fixed it.

[@jamesmccarthy3823]

He makes the exact same mistake in his video about the Fatman plutonium weapon. My high school physics teacher would have fried me in hog fat if I had made such a ridiculous claim in class.

[@williambarry8015]

If you guys are right then he should fix it then repost it cus other than that it's an awesome video.

[@jimmybeam5445]

@@williambarry8015 - We are right, and it’s a well-animated but mistake-filled video.

[@yourfriend_]

@@williambarry8015 yeah they're right, forming 2 atoms and 3 neutrons from 1 atom and 1 neutron grossly violates energy conservation

[@jackwhitestripe7342]

sir it is right according to the latest quantum technological knowledge. so it is true sir.

[@cchen19275]

4:42; in this chain reaction, the target Uranium will change to other 2 elements, NOT Uranium. When a neutron hits Uranium 235, Uranium 235 will become Krypton 92, Barium 141, 3 neutrons, and energy; that is: 92-235 U + 1 neutron → 36-92 Kr + 56-141 Ba + 3 neutrons + energy.

[@strawberry12four]

Thanks for the detailed explanation, I’m not a physicist but I knew that the description of the reaction was wrong as soon as it was made, not to mention the mistake with altitude of the detonation being described in kilometers instead of meters. I also question the description of the slug/target configuration. It makes more sense to fire a solid slug into the ring target but then again the ring/slug configuration may be more practical for the use of neutron initiators where spacing might be a critical factor for achieving optimal neutron density

[@RevMikeBlack]

At 3:11 you say that the preferred detonation altitude for Little Boy was "580 kilometers from the ground." Are you sure about that? That's 260 miles, which would place the bomb above the current orbit of the International Space Station. I don't think the Enola Gay had that capability.

[@Jungleland33]

It's bad when you mix up kms and ms.

[@jamesmccarthy3823]

It’s hard to believe he kept saying kilometers when it said meters on the screen. Lol.

[@RevMikeBlack]

@@Jungleland33 Look no further than the NASA Mars Climate Orbiter. Lockheed Martin used imperial measurements like they've done forever, but the geniuses at NASA thought the Lockheed measurements were metric. End result: NASA crashed their $125,000,000 satellite into the red planet. Next time someone says they're smart as a rocket scientist, your question should be, "Which one?"

[@remismeskas8388]

smart ass... everybody who watched this video, understood, without your fancy comment, that it was meters.

[@remismeskas8388]

you even got mixed up yourself. 580 km = 360 miles.

[@literacycornerglobal]

Hi, everyone. It's supposed to be 580 meters and not 580 kilometers. Sorry for the mistake. Don't forget to like and share our video. Thank you. 😁 This is the video of how the Fat Man, the atomic bomb that was dropped in Nagasaki, Japan. kzbin.info/www/bejne/mYq8Zot3grejoas

[@DeadDanganronpaGuy]

Uranium does not split into more uranium, it splits into lighter atoms.

[@greeknomad-vn1lo]

What the other person wrote U235 with neutron does not split into U235 but rather into krypton-92 nucleus and a barium-141 nucleus, and releases three more neutrons . The big question is why always releases 3 neutrons ?

[@athgt6630]

​@@greeknomad-vn1lo it does not always release 3. It may release 2 or 3, average 2.5. Also not every neutron that collides with a uranium atom will end up in fission.

[@KG84C]

Atoms are split, not duplicated.

[@30dudleystreet95]

The announcer said the bomb was set to activate at 530 Kilometres above the surface. Thats abouut 329 Miles high, (in space.). I think you mean 530 metres (1738 feet)

[@tomastomas75]

And he also repeats the same mistake more than once...

[@pmslevelboss]

Mississipi Queen was playing on my head all vídeo along.

[@deletdis6173]

Bro same XD

[@brucemitchell4895]

Nice video, but the detonation height would not be 580km, that would put it in outer space!!!!😂

[@Merryweather-Commander]

thanks! bro!!! now i only the materials!

[@Tonymontana-zh9sm]

Thanks for the video I been looking for a video with perceive detail explanation about how the neutron activated the fission

[@cpchehaibar]

1 U-235 atom + 1 Neutron does not equal 2 U-235 atoms. That would break energy and matter conservation laws.

[@mattg3971]

I’m pretty sure that if it was supposed to blow at 580 kilometers the bomb would have to fall up when it leaves the airplane

[@markbrouk7857]

😂 I thought the same thing, I had to rewind it because I thought I heard it wrong.

[@ajc389]

The ISS only orbits at two hundred km.

[@VitalySemkin1975]

@@ajc389 4 hundred minimum

[@deletdis6173]

*Badum-tss!*

[@mattg3971]

@@ajc389 the iss is at 250 miles or around 400 km

[@baseerehsan]

Very well explained

[@TheDasHatti]

Very detailed description! I like it!

[@DSAK55]

you're now on a watch list

[@VitalySemkin1975]

but wrong one

[@younesselhamzaoui5466]

Excellent. Which software yopu are used in your presentation? Thank you

[@Evan_Bell]

Little Boy was not based on the Thin Man. The little boy (Mk-1) preceeded the Thin Man. (Mk-2)

[@221b-l3t]

Yeah it was well underway by the time they got the first samples of weapons grade plutonium and realised the barrel would have to be way too long to fit in an aircraft. This was agreed upon July 1944 and the Thin Man and Little Boy teams were merged to focus on a uranium gun type weapon while Los Alamos got the job of figuring out implosion, which they had hoped to avoid. But they figured out the geometry for the slow and fast burning explosives, triangle of fast burning HE with half an egg of slow burning HE at the center so the shockwave slows in the middle and accelerates on the sides forming the typical convex shockwave into concave one. 32 of those around the core, with the finest timer 1940s electronics can make to sync the 32 detonators within a few nanoseconds of each other. They invented 20k frames per second x ray cameras to photograph the implosion, so they could tweak the exact shape of the HE to make it nice and round and compress the core to twice it's density and ignite it. :)

[@mport7754]

Informative thank for sharing🎉

[@dimitriosfromgreece4227]

Oo !! good video ❤️🙏 thanks

[@PHONKPROPHET]

as little boy we can confirm this is how we work

[@pastresmalin34]

Very informative, Thanks! But, please fix the the kilometers, instead of meters error.

[@jamesmccarthy3823]

That was hardly the only egregious mistake in this video.

[@kerentolbert5448]

Depending on the material used the, Uranium 235 or Plutonium 238, the manner of creating super critical mass is different. For U235 it is the bring together two sub-critical masses. For Pu238 it is the implosion method, the single mass is compressed spherically to increase its density. In either case the attempt is to increase the probability of Atoms splitting, at an exponential rate over several generations. Neutron reflect material is employed to enhance the process.

[@hypercomms2001]

A better configuration is a sphere with the initiator at the centre. I would imagine the reason why they went with this cylindrical arrangement was because of the complexity of attending a completely symmetrical spherical Super critical mass. They chose this design for the plutonium bomb, because the original design for the plutonium bomb I was also a gun type as well... called "Thin Man"... A reference to the film series with William Powell... But they found it would pre-detonate because of the presence of Pu-240... In fact later on, in later nuclear tests weapons were developed with Uranium -235 in a spherical configuration...

[@ajmeeraugendar]

580 meters only not 580 kilometers

[@gregaiken1725]

why are the two 235 cylinders 'mated' with such a high velocity? is that velocity only required to 'squish' the neutron pellets?

[@179pyrooyahc]

nisei goju ryu💯

[@gregorysagegreene]

High School Essay Project, 1975: Gun-Barrel Arrangement vs Collapsing Sphere.

[@louisriverin2295]

Very good and complete explanations - Thank you !

[@grzehuu07]

Nice video All good but one thing - not 580 kilometres but 580 metres. Cheers

[@atomiczeronerd6554]

Can you do a D.I.Y?

[@lycossurfer8851]

Yes. IKEA has a special section behind the futons for this; just ask for Gus on Thursdays after 9 AM

[@Sokol10]

Yes, just need 65 KG of HE Uranium 235, perhaps can order from North Korea.

[@almdrs]

So it is actually the speed of the "bullet" that triggers the reaction? I thought it would be something like a beam of photons or a "cannon" shooting neutrons that would destabilized the nucleus of the atom.

[@carlwest3441]

The uranium bullet hits the uranium core, slamming the two sub-critical pieces of uranium together. Now the total mass of the uranium is super-critical (neutrons have a high probability of finding a uranium atom) and a chain reaction can occur. The neutrons jump start the chain reaction, which sustains itself once enough atoms start to fission.

[@girishjoshi3624]

All these complecate calculation and make it work almost 80 yrs ago is telling how brilliant Oppenheimer was,

[@doggonemess1]

This might be the first video that showed the uranium assembly properly. Most show the opposite.

[@jackwhitestripe7342]

sir this video is publishing secret knowledge. please do not give this knowledge to third world countries

[@deletdis6173]

​@@jackwhitestripe7342XD

[@sabirtypist14]

Good video watching from Pakistan

[@JosephFarrier-c8q]

I bet a guy in his workshed could build one..just gotta mine your own yellow cake

[@benyomovod6904]

Be a nice boy, learn the difference between meter and Kilometer and rethink the products of the fisson, nice animation isNOT ENOUGH

[@Whiskey-xp6vu]

I think the plug was stationery and the rings were fired in their direction. A lot of descriptions have the plug being fired into the rings which I think was wrong I stand to be corrected.

[@johno9507]

That's exactly what the video shows.

[@reneflorencio5221]

589 kilometers or meters?

[@johnpaulmakowski7464]

Well done. Informative and explained well.

[@Sutterjack]

If my history is correct, scientists were so confident the gun-type atomic bomb would work that is wasn't even tested before Hiroshima.

[@foxtrotalphaone]

You are correct, Sir.

[@weirdshibainu]

Can i order one of these from Amazon? Asking for a friend.

[@robertjones7565]

Out of stock but they'll send you an email notice when they become available.

[@weirdshibainu]

@@robertjones7565 Thanks. I'll pass that on to him.

[@galewinds7696]

How do you want it delivered? Intact or from 2000 feet?

[@weirdshibainu]

@@galewinds7696 Intact. Still in the wrapper

[@PavanGangal-m5v]

I also want it i want to kill one of my enemies..

[@dannymolinari]

580km?? they bombed hiroshima from space🤦‍♂

[@Bean16429]

WHAT DOES ABNER DESIGN LOOK LIKE WHAT SIZE IT IS AND HOW IT ACTUALLY ACTIVATED WHEN THE URANIUM COLLISON STARTTT

[@citizenVader]

Still incredibly rough use of uranium. The effective uranium that was turned into energy was the same as a money bill.

[@robertkarp2070]

It really shows that people don't take the time to read the comments. People think they are the first to post a correction when it has already been posted about a 100 times. I wonder of he got the message that it's 580 meters, not kilometers by the 101st time posted.

[@phionahakello]

It was so horrific and terrifying

[@shahzaiburrehman8582]

is it 580 KM or M??

[@glakagz]

580 KILOMETERS? same as the Space Station ... 1945 wow

[@johnaugsburger6192]

Thanks

[@buchupatidhanunjaya3609]

ఒకప్పుడు నూక్లియర్ బాంబు తయారు చేయాలంటే చాలా కష్టం కానీ ఇప్పుడు చాలా టెక్నాలజీ వచ్చింది చాలా ఫాస్ట్ గా నూక్లియర్ బాంబు తయారు చేయొచ్చు 🤣🤣🤣🤣🤣🤣🤣🤣

[@qedqubit]

4:50 no, it doesn't double the number of uranium atoms

[@hypercomms2001]

The position of the neutron initiators would not be ideal, and so is highly likely that the bomb would start to disassemble before the chain reaction had completed.

[@Sokol10]

Of 65 Kg of Uranium in Little Boy was estimated than only around 1 Kg became critical mass - start the chain reaction. The rest was destroyed by the explosion.

[@usaccdecks8363]

Bro don't spoil Oppenheimer

[@ioanbota9397]

They are so powerful this bombs

[@pschroeter1]

Wow, that had more twice the info I already knew and I thought I knew a lot. Your depiction of a nuclear fission chain reaction sounds wrong. You don't mention the fission products two lighter atoms and make it sound like the fission is producing more U235. "Each U235 atom bombarded with one neutron will release two more U235 atoms three neutrons and energy."

[@Sokol10]

If are in that way - one U-235 Atom create more two U-235 Atom; the chain reaction never stop and will blow-up the entire planet. 🤪

[@dimitristripakis7364]

The altitude is obviously 580 meters, not kilometers.

[@AAAA35345]

Nukes are overrated, japan only got flattened because they had wooden buildings and wood based housings. Most of the concrete survived.

[@221b-l3t]

Yeah 12 kt... 100 kt is considered a small tactical nuke today.

[@Chauntecleer]

Pretty sure, if anything, nukes are underrated. I mean, unless ARS sounds fun to you, or you feel safe in a cement apartment building as a miniature sun is detonated over your head

[@221b-l3t]

Also look at pictures of Hiroshima, the city center itself was all cement. And only one very heavily reinforced building survived along with the vault of a bank directly under the bomb. Besides your detonation altitude sets what overpressure you optimise for. So depending on if you want to bust residential homes or reinforced concrete you choose your altitude.

[@pega1ag171]

Where is the tall boy

[@fractalmadness9253]

Sounds like a familiar accent. But if this is the level of physics they’re being taught at ‘skool’, they won’t be a nuclear power anytime soon.

[@kriwe4013]

Need tutorial

[@misaghkhosravi4541]

Little boy will be gifted to our dearest enemies👍

[@neongirl]

130,000 civilians in Hiroshima were your enemies?

[@holybigbang]

that guy sounds very annoyed. as if it was the 27th take or something

[@ricvis44]

Nothing was said about the “insulating foam?”

[@Sokol10]

This was used in others types of bombs.

[@LondoneNikeArdilla]

Betapa pentingnya sebagai manusia untuk saling menghormati Hak Asasi Manusia dari banyaknya suku-suku bangsa di seluruh dunia penduduk bumi ini, setiap manusia mempunyai kedudukan yang bertingkat-tingkat pangkat dan derajat sesuai anugerah yang diberikan oleh Allah, Tuhan Yang Maha Esa. Jadi tetap berpegang kepada yang hak (benar) seketika itu yang batil lenyap.

[@fractalmadness9253]

The rings of power.

[@joshjones3408]

The ring is fired over the slug the slug is fixed it does not move

[@Sokol10]

That's exactly what the video shows, the U-235 ring is fired over the fixed U-235 slug, with the Neutrons initiator behind.

[@aktchungrabanio6467]

Meters not kilomters baby. OH BABY.

[@LondoneNikeArdilla]

Bom atom (Nuklir) yang selama ini di buat dengan berbagai jenis-jenis ledakkan yang besar dan ada yang sangat besar ledakkan nya yang dapat meratakan seluruh kota London, siap di uji coba. Dengan cara menerapkan strategi seperti di Hiroshima & Nagasaki Japan waktu dulu.

[@Jack_The_Ripper_Here]

3:08 what altitude mate ? looool

[@차성권-o8j]

Wonderful,Wonderful,Wonderful, attack

[@ioanbota9397]

They are powerful this bombs

[@tomadams2319]

Good graphics but a couple obvious mistakes in the text, such as 580m, not Km, and U-235 split, not duplicated as mentioned below.

[@TresMiguels]

Multiple factual inaccuracies in this. Fission products. Meters and kilometers etc.

[@davecurry8305]

580 kM is approximately 360 miles. Robo voice needs reprogramming.

[@imponentusgamer3247]

Fun fact: a student made an such an intricate essay of how to make a nuclear bomb that even the FBI got involved in seizing his works. :V

[@WARDISWARD]

03:07 You mean 580 meters instead of kilometers 03:46..again same mistake , 580 Kilometers ???

[@richardhenry5822]

580 kilometers?

[@pmacgowan]

You keep saying 580 kilometers instead of meters

[@dasdguy7606]

580 kilometers is 360 miles. What else is incorrect in this video?

[@foxtrotalphaone]

The video claims that when a U-235 atom absorbs a neutron it duplicates itself when in fact it splits into smaller atoms.

[@siamsubbir9174]

Who's here after Oppenheimer?

[@ihaveaboyfriendmeh1026]

580 metres* as shown. Not 580 kms.

[@deletdis6173]

"We'll never surrender to you America-" 3:50

[@Blashkyrk]

It's meters, not KILOmeters!

[@pandunga]

... 580 kilometers above the ground to explote ?????????

[@toastergaming7783]

Making a nuke that functions essentially like a gun is the most american thing ever

[@PartTimeJedi]

580 METERS above target not kilometers

[@jaersee]

How works a RDS-6 soviet THERMONUCLEAR bom of a single stage?

[@Chauntecleer]

Thermonuclear bombs, also called H-bombs or Hydrogen bombs, work by using a fission reaction, usually U-235, just to produce enough thermal energy to cause nuclear fusion in a mass of Hydrogen, which is where the real force of the bomb comes from. If by “single stage” you mean a bomb without a fission reaction before nuclear fusion, then such a bomb does not currently exist, as energy-positive nuclear fusion is currently not possible

[@Sokol10]

@@Chauntecleer Not the thermal energy, but the radiation cause the fusion.

[@Chauntecleer]

@@Sokol10 radiation isn’t a type of energy but a word used to describe the way energy travels through space. If you mean the energy of alpha, beta, and gamma particles emitted from a fission reaction, then those types of energy will ultimately turn into thermal energy, which is why radioactive Uranium is hot, for example. The fact that a fission bomb is radioactive is only a side effect of its mechanism, not it’s purpose; the purpose of any fission device is to release an incredible amount of energy through a nuclear chain reaction, energy which generally takes the form of heat

[@michau1474]

WTF? One U235 splits into another two U235?? And I thought the altitude of 580 KILOmeters (said twice) makes this vid a crap.

[@Sokol10]

Well, with one U-235 Atom splinting in two U-235 Atom they need drop the bomb at 580KM height, because the chain reaction will continue indefinitely and destroy the entire planet, perhaps the Solar System.

[@Waldvogel45]

580 km is careless. Correct this video

[@KG84C]

Lol, U235 atom splits into, huh, more U235 atoms, what sorcery is this?

[@DrBlood-cq2cm]

Why is it that cgi humans always writhe about like they have parkinsons dz?

[@dominic4379]

*580 meters not kilometres

[@shadowz3089]

4:42 RIP Conservation of Mass

[@x808drifter]

How AN atomic bomb works. Or How atomic bombS work. Pick one.

[@ericssonmaingindundandunda2119]

It's meters not kilometers

[@saidinesh4066]

Who ia here after oppenheimer movie.

[@kentkrueger6035]

Meters, not Kilometers

[@namvet_13e]

580 meters, not km

[@vipersb1]

IMO, the "Fat Man" plutonium bomb is far more impressive.

[@DrBlood-cq2cm]

580 km is 360 miles. Pretty sure WWII prop planes couldnt climb thar high.

[@rotsennestor9255]

this video made a number of errors on how the A-bomb exploded!