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Questions tagged [explosions]

The tag has no usage guidance.

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Calculate The Force In A Explosion [on hold]

I Wanted To Know How To Calculate The Force In A Explosion, But I Do Not Have The Mass Of The Object That Exploded. Can Someone Help. Also To Get A Better Picture, I'm Doing Mathematics & ...
0
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0answers
180 views

Risk of megaton steam explosion from Chernobyl? [duplicate]

In the new Chernobyl TV series (https://en.wikipedia.org/wiki/Chernobyl_(miniseries)), in episode 2, there's a reference to the risk of a steam explosion from the molten reactor core entering a water ...
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1answer
53 views

Will the mass of a stick of dynamite be conserved when it is exploded?

If a stick of dynamite is blown up in a hermetically sealed chamber, the mass of the chamber and fragments, the heat, sound, and light would still be equal to the original mass of the chamber and ...
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3answers
2k views

How large would the steam explosion at Chernobyl have been?

So the second episode of the HBO series began to cover the risk of a steam explosion that led to them sending three divers into the water below the reactor to drain the tanks. This occurred after the ...
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0answers
31 views

What is the maximum energy that can be released by thermonuclear device?

Forgive me by posing this somewhat scary question, but it's just out of curiosity I'm asking it. In this video we're witnessing the beautiful and at the same time horrific blast of the tsar bomba, ...
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1answer
32 views

What would happen if you dropped a stick of dynamite from a high place?

If you were to drop a stick of dynamite from a high place, what would happen once it hit the ground, and why?
3
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1answer
118 views

Is making nuclear bomb using natural uranium possible?

I know that the critical size of natural uranium metal with graphite moderator is about 27 tons "oak ridge graphite reactor". for comparison highly enriched uranium have only 17 kg critical size with ...
2
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1answer
38 views

Can hydrogen plasma react with oxygen?

What if you put hydrogen in a vacuum and turned it into a plasma? There is no oxygen in the vacuum, but once you eject the plasma would it react drastically with the oxygen? Would it explode? Would ...
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1answer
39 views

What comes out of binary black holes at end of inspiral?

When 2 blackholes are orbiting each other so close that they lose more energy in form of gravitational wave, this process is inspiral and is unstoppable until it explodes. This is an extremely violent ...
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2answers
9k views

How do we get supersonic bullets?

I recently answered a question on the WorldBuilding forum about grenades and bullets. One of the things that came up was that I argued smokeless powder in a rifle round could detonate, but was ...
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5answers
842 views

What is the Half-Life of a Large Chunk of Fissile Material?

Uranium-$235$ has a half-life of about $700$ million years and a critical mass of about $52\,$kg. That means if you take a large number of $U$-$235$ atoms, say a $26 \,$kg amount, and put each atom in ...
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0answers
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How can I calculate the impulse caused by a nuclear bomb on structures?

I want to calculate the impulse caused by a nuclear bomb on structures. Is there a function that I can use to calculate the amount of impulse acted upon by a nuclear bomb depending on its size? Also, ...
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1answer
61 views

How does the lower-explosion-limit (LEL) of gasoline depend on O2 concentration?

The lower-explosion-limit (equal to lower-flameable-limit) of gasoline is 1.4 vol.-%. (https://en.wikipedia.org/wiki/Flammability_limit) I assume that this value derived for the mixture between ...
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1answer
69 views

Does plutonium need to be squeezed to produce an uncontrolled chain reaction?

I guess what I am asking is if in theory you could start with a certain amount of plutonium would it explode with out being squeezed together as is done in an atomic bomb ? Normally what happens ( ...
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1answer
343 views

Is kinetic energy of a system conserved during bomb explosion? [duplicate]

Conservation of momentum is a very obvious thing, but I can't figure out if kinetic energy would be conserved or not. You can think in two ways: Initial kinetic energy is zero and final kinetic ...
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3answers
164 views

How can you protect yourself from an acoustic shock wave?

To protect your electronics during a huge Electromagnetic Pulse in the RF range, all one needs is a Faraday shield for the most part. On the other hand, what do you do when you are near an acoustic ...
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1answer
73 views

What will happen to you if you're standing near exploding TNT bomb near 20meter away in Vaccum?

What I think here could be ,that we'll feel less powerful shock wave as there is no medium of air through which gases can travel . If their is any other possibilities than please suggest !
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2answers
46 views

Temperature of macroscopic explosions

How would one mathematically determine the temperature (if possible) of a detonation (non-chemical) of something on a macroscopic scale; more specifically: detonations from matter and anti-matter ...
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2answers
172 views

What happens if Jupiter is ignited?

I was wondering, what would happen if there was a large amount of oxygen released into Jupiter's atmosphere, than igniting it? Because Jupiter is 90% gas, therefore being a big fire waiting to happen (...
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2answers
50 views

Observations of a mushroom cloud

In this video of a nuclear bomb detonation/mushroom cloud, a few peculiarities arise and I simply had a couple questions pertaining to observations in the animation: Following the detonation, the ...
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1answer
63 views

Would I see a mushroom cloud if I nuke the sun corona?

The sun corona can reach an extremely high temperature at least a few million degree, say if the temperature of the explosion of a nuclear bomb is roughly equal to the temperature of the corona then ...
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1answer
131 views

Why Hydrogen bomb is called “Thermonuclear Bomb”?

Why do we call Hydrogen bomb as "Thermonuclear Bomb" ?
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2answers
162 views

What would happen if you detonated a nuclear bomb inside a tank of liquid hydrogen?

Say you had a large bomb - take the 50 megaton Tsar Bomba. You then proceed to place it in the center of a spherical tank containing liquid hydrogen, and then detonate it. Could you start a fusion ...
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1answer
42 views

What % of the energy from a spherical explosion pushes away a perpendicular plane?

I'm trying to figure out how much energy from an explosion pushes away an object vs either completely missing it or having its horizontal component cancelled out by an opposing horizontal force from ...
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4answers
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Why exactly do atomic bombs explode?

In atomic bombs, nuclear reactions provide the energy of the explosion. In every reaction, a thermal neutron reaches a plutonium or a uranium nucleus, a fission reaction takes place, and two or three ...
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2answers
51 views

What neutron spectrum should be produced from a low level nuclear fission event?

I am trying to determine what neutron spectrum would be produced by a low level nuclear event (for example a tactical nuclear weapon). What ratio or combination of thermal, slow, and fast neutrons ...
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1answer
155 views

How fast would the destruction caused by an asteroid impact travel on earth?

I know it depends on mass and speed, so take for example the asteroid that caused dinosaurs mass extinction. I read that it was 6km (10 miles) wide. How fast did the destruction - trees, rocks, dirt, ...
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2answers
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Why it took such a long time for an army of physicists to realize the atomic bomb, while in theory it seems pretty easy?

I think most of us know about the construction of the first atomic bomb at Los Alamos, with Robert Oppenheimer (who said he became "The destroyer of worlds", which goes to show he regretted his ...
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0answers
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Does mankind possess the technology to intentionally trigger a Yellowstone eruption? [closed]

The Yellowstone Caldera eruption will probably be an Extinction Level Event when it eventually happens. Suppose some lunatic wanted to set it off now, with drills, bombs, or whatnot. Say this lunatic ...
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1answer
100 views

Can a fusion bomb make electricity? [closed]

Would blast energy remove a single piece of pre-cut earth above an underground explosive? Could you then break apart the piece of earth and lower it back into the cavity as a way of generating power? ...
2
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1answer
250 views

Barrel length influence in muzzle velocity

I want to find out what is the muzzle velocity of a bullet. For that I would need to know the force applied to the bullet by the expanding gas of the exploded powder. If $P = F/A$ then $F = PA$. I ...
2
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1answer
207 views

Putting grams of antimatter in the atmosphere

From some rough calculations with 10g of anti hydrogen, I came out at roughly a gigatonne of TNT's worth of energy - 1.2x10^22J. That should be a pure gamma output initially, but I'm curious as to ...
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0answers
57 views

Can the Leidenfrost effect mitigate thermal effects of a nuclear blast? [closed]

I'm just spit-balling ideas for a video game scenario. I'm curious whether an above-ground structure with active insulation layers could withstand being in the blast radius of a strike capable of ...
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2answers
141 views

Distinguishing an underground Hydrogen bomb test from a fission bomb explosion

A related question is Hydrogen bomb radiation output, but my question is based on the seismograph data (or any other data) possibly producing a distinctive pattern. Is it possible to tell the ...
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0answers
60 views

Can an atomic bomb/rocket with nuclear warhead's nuclear explosion be triggered by a conventional explosion close to it?

Starting the nuclear chain reaction isn't achieved trivially and depends on the design ((shot)gun or implosion). Can one be sure that with either of those designs the chain reaction (causing a thermo-...
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2answers
169 views

Could you cause a small “nuclear” explosion manually

I've been having a discussion with a friend about nuclear materials and whether bringing two bits of subcritical fissile material together at a decent enough speed would cause a spontaneous explosion. ...
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2answers
232 views

How would a nuclear explosion look in vacuum?

Approximately, how does the specific luminosity, $L_\nu(t)$, of a nuclear explosion in a vacuum look as a function of frequency and more importantly, time? Assume the observer is very far away. If ...
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4answers
31k views

Would a pin head heated to 15 million degrees Celsius kill everyone in a 1000 mile radius?

The YouTube video How Hot Can it Get? contains, at the 2:33 mark, the following claim: A pin head heated to 15 million degrees will kill everyone in a 1000 miles radius. On what basis can this ...
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1answer
29 views

If our ears were resistant to the zero air pressure on the moon, could we hear a balloon explode there from nearby?

A big balloon filled with air explodes on the moon. Suppose we could bear the zero pressure on the ou there. Then the balloon explodes. Could we hear this explosion, from very nearby? A huge amount of ...
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0answers
27 views

If we let let explosives go off under one of the side of a skycraper, what will happen? [closed]

Imagine a skyscraper under which explosives are placed, but only beneath one of its sides. After detonation of the explosives, will the side under which the explosives were placed come crumbling down, ...
2
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1answer
321 views

What causes the expansion and implosion of the medium before an explosion?

I often see in slo-mo explosions, whether underwater or in air, the medium expanding outward before imploding, at which point the flash of the explosion happens. I used to think this was a cool movie ...
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1answer
8k views

How and why would a glass table break in this manner?

Recently, a relative of mine came to me asking me to explain a strange physics phenomenon. She had 3 glass tables; 2 small and one large arranged neatly such that the small tables were half enclosed ...
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2answers
432 views

Why do internal forces support conservation of momentum but not law of conservation of energy when a shell explodes?

When a shell explodes, we get several pieces with different kinetic energies but the momentum is conserved since no external force is acting. But the sum total of the kinetic energies of the pieces is ...
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2answers
471 views

What makes a fusion reaction an “explosion”?

The Lawrence Livermore National Laboratory just put out a bunch of movies of atomic bomb detonations. How does the nuclear reaction generate the destructive shockwave that can be seen? If it just ...
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2answers
180 views

Is it impossible for reactor grade uranium to be detonated?

So, this is a question that has been puzzling me for numerous reasons. Be it for advocating nuclear power, or getting a bit of nerd rage when watching a sci-fi work, or having an argument with someone....
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1answer
117 views

Behavior of a ignited drum of gunpowder

To get the immediate question out of the way: We were playing a Pen & Paper RPG and it "just happened". Question Take a 200 Liter Standard Steel Drum, fill it with gunpowder, remove the lid and ...
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detonation and deflagration in supernovae

I'm reading about supernovae processes. The article mentions that there are these two processes in combustion, detonation and deflagration. The article goes on to state that the fact that a wide ...
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1answer
954 views

Why isn't there any impulse due to gravity?

Whenever we consider an explosion of a projectile in air, we solve for the velocities of the exploded elements by using the Law of Conservation of Momentum (ignoring any sound or light effect here). ...
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1answer
155 views

Conservation of linear momentum after explosion with friction

Let's say you have a bomb at rest submerged in a liquid. It then explodes into two equal fragments A and B which leave in opposite directions. If we ignore the fluid and any sound or light we can ...
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1answer
2k views

Nuclear bomb mushroom cloud with trumpet formation

I have found this specific image here (Loong found out that it is the Soviet Joe 4 test of the 400 kiloton RDS-6 warhead at the Semipalatinsk test site on August 12, 1953): Also an impressive Youtube ...