The Difference Between High Explosives and Low Explosives

I didn't even realise that "low explosives" were a thing; let's talk about deflagration, detonation, and how high explosives can actually be safer. • Thanks to Steve from Live Action FX: liveactionfx.com/
Filmed safely: www.tomscott.com/safe/
Camera: Simon Temple templefreelance.co.uk
Edited by Michelle Martin: mrsmmartin
I'm at tomscott.com
on Twitter at tomscott
on Facebook at tomscott
and on Instagram as tomscottgo

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  • Steve is extremely qualified as an explosives engineer, but thankfully after what he says here, not as a firefighter.

    Tom ScottTom ScottМісяць tagasi
    • This mad lad has figured out how to time travel with a home computer

      Seal BoySeal Boy11 päeva tagasi
    • So umm would cutting the cheese be a high explosive or a low one asking for a friend

      joe jackojoe jacko11 päeva tagasi
    • I can’t believe I missed this comment for four whole weeks

      KingKing12 päeva tagasi
    • @Guess Undheit or how about somebody with noise sensitivity should either not watch a video about explosions, or have the noise down very low already.

      biggreenblobbiggreenblob13 päeva tagasi
    • Ey

      Ryandhika FitryansyahRyandhika Fitryansyah13 päeva tagasi
  • Okay, smart guy. Is there a "mid-explosive", to complete the trio?

    Richard SamuelsonRichard Samuelson2 tundi tagasi
  • Well, today I learned something again. High explosives really show that in order to create a runaway reaction, you need high pressure, either by containing it, or by its own shockwave. Thank you, Tom!

    750 kV750 kV3 tundi tagasi
  • 1:47 I swear the camera is focusing on the smoke rising up... I think I have seen this before...

    Hand Grabbing FruitsHand Grabbing Fruits4 tundi tagasi
  • I'm watching this thinking is this legal

    Max SpechterMax Spechter4 tundi tagasi
  • A smoke ring that Bilbo would be proud of

    oneworldfamilyoneworldfamily5 tundi tagasi
  • Thanks! Very informative :)

    John SmithJohn Smith16 tundi tagasi
  • Poor camera

    Howdy I'm FloweyHowdy I'm FloweyPäev tagasi
  • Similar to the nightstick and the daystick.

    VvultasSVvultasSPäev tagasi
    • Special credits go to Camera, who endured several explosions in the making of this video.

      pida siouypida siouy11 tundi tagasi
  • This is actually a fantastic ad for GoPro cameras.

    sokin jonsokin jonPäev tagasi
    • mean 'deflagration' since that is a 'low explosive'..."

      pida siouypida siouy11 tundi tagasi
  • 0:38 I was thinking the same thing, I asked myself “what is a high explosive?” And then I saw this video.

    Ajc 7575Ajc 7575Päev tagasi
  • "The last time I was making a video at this explosives test facility-" * Points at someones backyard *

    pida siouypida siouy2 päeva tagasi
    • forbidden playdoo

      sokin jonsokin jonPäev tagasi
  • What’s the best place to buy a ton or two of the high stuff?

    Ian ConcannonIan Concannon2 päeva tagasi
  • Tom Scott, you are the best. Sunsayd

    Adrian GAdrian G2 päeva tagasi
    • Neat.

      pida siouypida siouy2 päeva tagasi
  • "The last time I was making a video at this explosives test facility-" * Points at someones backyard *

    bilishu alissbilishu aliss3 päeva tagasi
  • I actually found this out as a kid by watching Tremors 2.

    T1000T10003 päeva tagasi
  • Oi mate why dat bomb guy look like a goblin?

    MyceliusMycelius4 päeva tagasi
    • If you feel like making any any more explosives videos please stick with Steve, he's really good at explaining.

      bilishu alissbilishu aliss3 päeva tagasi
  • The bang at 1:45 sounds like it would make for great realistic gun shot SFX.

    Jack MellorJack Mellor4 päeva tagasi
  • 3:57 the way the camera goes flying lmao

    facts and logic.facts and logic.4 päeva tagasi
    • That camera did a barrel roll right at the end of the video 4:05

      dolita windodolita windo4 päeva tagasi
  • You should make a video about right to repair and Louis Rossmann's campaign to get it passed in Massachusetts and hopefully hopefully other places that follow.

    Chicken NuggetChicken Nugget4 päeva tagasi
    • "The last time I was making a video at this explosives test facility-" * Points at someones backyard *

      dolita windodolita windo4 päeva tagasi
  • So what was the damage to the GoPro?

    Act MgrAct Mgr4 päeva tagasi
  • forbidden play dough

    MaisieMaisie5 päeva tagasi
  • Meanwhile, the GoPro says in a little squeaky voice "I'm not dead yet".

    seiom jvonyseiom jvony5 päeva tagasi
  • Tom Scott: Spoiling my fun at pointing out to people unknowingly talking about [low] explosives "detonating"... "Well actually..." (You'll have to imagine the nasally voice) "... You mean 'deflagration' since that is a 'low explosive'..."

    Ser Garlan TyrellSer Garlan Tyrell5 päeva tagasi
    • GoPro should pay you for the free advertising you just gave them, that is one durable camera!

      seiom jvonyseiom jvony5 päeva tagasi
  • Special credits go to Camera, who endured several explosions in the making of this video.

    ThomasThomas6 päeva tagasi
    • GoPro should pay you for the free advertising you just gave them, that is one durable camera!

      seiom jvonyseiom jvony4 päeva tagasi
  • Not all explosives are fuel oxidiser reactions though he's describing binary explosives (generally a metal oxidiser reaction) although alot of them these days are actually to do with bond strain, high heat of formation etc in a single chemical (RDX, any of the azides, NTI classic examples) it's not just a really mixed low explosive. It's also catagorized by detonation velocity. The channel explosions and fire explains this really well

    Mick MMick M6 päeva tagasi
    • "The last time I was making a video at this explosives test facility-" * Points at someones backyard *

      seiom jvonyseiom jvony4 päeva tagasi
  • forbidden playdoo

    dnL unsodnL unso6 päeva tagasi
  • So is no one going to mention that vortex ring? That was amazing.

    dolita windodolita windo6 päeva tagasi
  • Neat.

    Ministry of Magic: Department of MysteriesMinistry of Magic: Department of Mysteries6 päeva tagasi
  • HE'S NOT WEARING A RED SHIRT

    Short On IdeasShort On Ideas6 päeva tagasi
    • the most fascinating subjects, particularly the chemistry and physics of explosives and propellants.

      dolita windodolita windo6 päeva tagasi
  • Funny isn't it, how the direction of your content is no longer yours in any fashion, neither directionally or content-wise. The slow degradation of unique and original creative content comes simultaneously with an false sense of urgency to appease algorithms and keep the cash flowing. Bend over, your soul is being shared by the world.

    War DogWar Dog6 päeva tagasi
  • If you feel like making any any more explosives videos please stick with Steve, he's really good at explaining.

    Henrik OldcornHenrik Oldcorn6 päeva tagasi
  • Thanks Tom, now we're ALL on a government watchlist.

    Japanese GuacamoleJapanese Guacamole6 päeva tagasi
  • "The last time I was making a video at this explosives test facility-" * Points at someones backyard *

    doire aintudoire aintu7 päeva tagasi
  • That camera did a barrel roll right at the end of the video 4:05

    Jack ScrivensJack Scrivens7 päeva tagasi
  • 0:06 I had that with Brexit. I had a rough understanding of what it was, but it took an embarrassingly long time to realize it was "Britain's exit"

    Danny NewhouseDanny Newhouse7 päeva tagasi
    • I guess Beirut explosion = low explosive then.

      doire aintudoire aintu7 päeva tagasi
  • Hahah i Barely understand that

    Retro GrizzlyRetro Grizzly7 päeva tagasi
  • Why does that guy speak in x1.25 speed

    OmniRadioOmniRadio7 päeva tagasi
  • "The last time I was making a video at this explosives test facility-" * Points at someones backyard *

    mikea hiooimikea hiooi7 päeva tagasi
  • GoPro should pay you for the free advertising you just gave them, that is one durable camera!

    Draconicrose GamingDraconicrose Gaming8 päeva tagasi
  • The forbidden raspberry bubblegum

    SamSam8 päeva tagasi
    • Lebanon 🇱🇧

      mikea hiooimikea hiooi7 päeva tagasi
  • This channel is just great.

    dog breathdog breath8 päeva tagasi
  • Love things that burn and go boom!

    Sasinc1102Sasinc11028 päeva tagasi
  • You know your channel has made it when you can treat go-pro's like disposable cameras.

    Closeup ChannelCloseup Channel8 päeva tagasi
  • Tom, thanks for making this video! I'd love to see plenty more videos about this subject and plenty more of Steve's excellent presentations. Chemistry and physics are some of the most fascinating subjects, particularly the chemistry and physics of explosives and propellants.

    Anodyne MelodyAnodyne Melody8 päeva tagasi
  • I didn't know play-doh was explosive

    Dean WillisDean Willis8 päeva tagasi
  • 0:11 that reminded me to google the etymology of "parapet," a word i look at every time i leave the library, intend to look up, and then forget to by the time i get home. thank you.

    Avarni BAvarni B8 päeva tagasi
  • Another fantastic tidbit thanks

    PIECES OF TIMEPIECES OF TIME8 päeva tagasi
  • I realized something like that yesterday when I realized that vacuum and continuum both have 2 Us in a row.

    MakaneekMakaneek8 päeva tagasi
  • This explains why the high explosives in the SS Richard Montgomery are safe, unless the cluster bombs go off.

    inkink8 päeva tagasi
  • I guess Beirut explosion = low explosive then.

    echan101echan1019 päeva tagasi
  • Tom scott i love your videos so much .. please never stop :')

    CwJCwJ9 päeva tagasi
  • me listening to rain sounds 10hrs to relax: 😌 autoplay: 1:45

    ThisIsAMJThisIsAMJ9 päeva tagasi
  • The real question is : is the GoPro really dead ?

    Charlie.Charlie.9 päeva tagasi
  • So what is technically called Low Explosives is what is more commonly just called explosives, like fireworks. It's interesting to think that carrying 50 kilos of C4 plastic explosive is more safe than 50 kilos of fireworks considering one is used by military and law enforcement and another is used by those as young as elementary school age (with proper supervision of course).

    Matt YoakumMatt Yoakum9 päeva tagasi
  • Lebanon 🇱🇧

    t swerdnat swerdna9 päeva tagasi
  • Tom scott is the guy that answers all the random questions you asked to your dad back in the day

    Mikołaj NagyMikołaj Nagy9 päeva tagasi
  • Would be cool if there was a way to incorporate these into your mouth so you could actually shout like in Skyrim :D

    Jordan WeirJordan Weir9 päeva tagasi
  • That Semtex looks like tasty watermelon chewing gum.

    HappyBeezerStudios - by Lord_MogulHappyBeezerStudios - by Lord_Mogul9 päeva tagasi
  • But what about medium explosives?

    HappyBeezerStudios - by Lord_MogulHappyBeezerStudios - by Lord_Mogul9 päeva tagasi
  • This is your 600th video!

    2C (02) Chan Kwan Yu2C (02) Chan Kwan Yu9 päeva tagasi
  • Did u get shadow banned or something?

    River HardmanRiver Hardman9 päeva tagasi
    • i think the video might have been private or taken down by YT

      ThetomgamerboiThetomgamerboi9 päeva tagasi
  • So fireworks are low explosives?

    blankblank9 päeva tagasi
  • Tbh. I just want to see things go boom

    MR hi guyMR hi guy9 päeva tagasi
  • 😊😲

    fatehyabalifatehyabali9 päeva tagasi
  • 1:59 *_Forbidden Bubblegum_*

    AlexanderAlexander10 päeva tagasi
  • i mean he's not unright, but i don't like it. i get that it's for the internets but still... oh and anybody claiming 1.1 is safe in a fire is a bloody muppet

    Evan McCloyEvan McCloy10 päeva tagasi
  • Fun fact, most things can be "fuel" for energy expenditure purposes, and foodstuffs tend to have more chemical energy than explosives, they just also usually aren't oxidized. If you make a big cloud of them, a single spark can make a BIG boom

    YourantsallyYourantsally10 päeva tagasi
  • Well, the government is now watching us.

    Alien BaconaterAlien Baconater10 päeva tagasi
  • Now we just need a tutorial on manufacturing

    In process to deleteIn process to delete10 päeva tagasi
  • 3:27 „Stephen focus!“

    Felix H.Felix H.10 päeva tagasi
  • Why does the semtex look so... Tasty?

    Alex ThorntonAlex Thornton10 päeva tagasi
  • Tom Scott's channel is a more interesting Discovery channel

    extream kabab ilextream kabab il10 päeva tagasi
  • Low explosives is a thermal reaction high explosives is a chemical reaction. Every Irish schoolboy learned this in his science class, even the quantity allowed for transport. Oh yea, the schoolgirls were included!😂

    kdmc40kdmc4010 päeva tagasi
    • Are you under the impression that low explosives are not chemical reactions?

      Gareth HGareth H10 päeva tagasi
  • Nicely done. Now I am getting into finer points. Not all high explosives are molecular explosive, like TNT or PETN, with the fuel and oxidizer all in one molecule. Some are mixtures such as ANFO (ammonium nitrate-fuel oil) - no chemistry happens when these are mixed. Similarly smokeless powder, usually considered a low explosive, is primarily composed of nitrocellulose which does have a fuel and oxidizer in one molecule. The defining difference is the speed of the reaction. High explosives detonate at a supersonic speed while low explosive deflagrates at a subsonic speed.

    Gavin EdmondstoneGavin Edmondstone10 päeva tagasi
  • Content

    garGANtuangarGANtuan10 päeva tagasi
  • Its funny how the intro also perfectly applies to tom mispronouncing 'explosive'

    ChloeChloe10 päeva tagasi
  • So, high explosives are similar to how nukes are made, where you need a primary explosion to set off the main reaction

    Rebecca ConlonRebecca Conlon10 päeva tagasi
  • I play Airsoft at that place. It's called ace combat

    Your Mum StinksYour Mum Stinks10 päeva tagasi
  • The lowexplosive is fireworks,high explosive is c4

    Rebecca ConlonRebecca Conlon10 päeva tagasi
  • Ok

    Mckenzie WelshMckenzie Welsh10 päeva tagasi
  • You should do a video on 'Operation Vegetarian'

    Luke DaviesLuke Davies10 päeva tagasi
  • ...left the GoPro right next to the detonation, but the camera survives, just flies away, remains operative. Maybe the BEST advert for that camera you could think of...

    gajustempusgajustempus10 päeva tagasi
  • 1:58 - Forbidden cheese.

    A.F. WhitepigeonA.F. Whitepigeon10 päeva tagasi
  • any collaborations with smartereveryday, mark rober, veritasium ect. in the future?

    I Judge YouI Judge You10 päeva tagasi
  • 691k views and 69k likes Mmmm nice

    Zaid AhmadZaid Ahmad10 päeva tagasi
  • Looks like a giant block of bubblegum

    C YC Y11 päeva tagasi
  • Based Tommy Scot admitting his mistakes and issuing a clarification/correction upon the realization.

    Nonaya businessNonaya business11 päeva tagasi
  • steve the pyrotechnics expert is making me think the video is playing at 1.5.x speed

    Ian SampsonIan Sampson11 päeva tagasi
  • Wow I didnt thought that explosives made mushroom clouds at all except for atomic bombs

    Flat Mars SocietyFlat Mars Society11 päeva tagasi
  • Hi Tom Can you do a video on backslang/pig latin.

    Aleena ThomAleena Thom11 päeva tagasi
  • "High explosives won't go off ... unless you want them to." Although this depends on the explosive: nitroglycerine in particular is *notorious* for going off simply by dropping it.

    Alpheus MadsenAlpheus Madsen11 päeva tagasi
  • His tongue out at 3:30 is exactly what I imagine an explosives expert to look like.

    Phil StarPhil Star11 päeva tagasi
  • I don't know what that red putty is, but it looks delicious

    Moritz BurkleMoritz Burkle11 päeva tagasi
  • Kudos to GoPro, now that's a very resilient camera!

    Silvia SánchezSilvia Sánchez11 päeva tagasi
  • Tom Scott's vlogs are more informative than some educational programs. Dude is a legend. I would watch him sit in a high class english styled study, and drink tea to classic music. Nothing else. Just that.

    OonadaOonada11 päeva tagasi
  • Since when is a deflagration an explosion? I've been taught my whole life that gunpowder being lit in a pile is not an explosion but a deflagration, and that it's based on the speed at which the shock wave travels from the blast.

    ArrKayCeeArrKayCee11 päeva tagasi
  • Can we have a steve trilogy like norm

    Daniel JarvisDaniel Jarvis11 päeva tagasi
  • Im wearing earbuds, is that a bad ideal?

    Charles SmithCharles Smith11 päeva tagasi
  • Just yesterday I was talking with my friend and i realized that a gravedigger is someone who actually digs graves

    RumbleZeroRumbleZero11 päeva tagasi