Questions tagged [explosions]

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92 views

Could you theoretically build an nuclear-blast-proof safe? [closed]

Some bulletproof safes are sturdy enough to handle grenade impacts. Could we theoretically make an analogous atomic-proof safe that will handle something like an Hydrogen Bomb? It doesn't matter the ...
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1answer
31 views

Concept of energy created from explosion

I have seen people talking about energy of an explosion in movies. However, I did not understand what they mean. So I decided to do some thought experiment on it. I will lay down my thoughts and what ...
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1answer
36 views

High pressure collapsing time of Water, Air or any medium by size and speed of waves

Explosion in water ( air ) creates high pressure, and expands water ( air ), and after that it collapses back. How to calculate time or speed of collapsing, if wave propagation speed of water or air ...
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3answers
73 views

Is energy always a constant when the momentum is constant? [duplicate]

How is it that when momentum is constant, energy always stays a constant. For Example :- if $P = 0$ kinetic energy will also be 0. But in a explosion (that momentum is conserved) where the object was ...
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1answer
23 views

Shaped Charge Physics

It seems that I have a problem understanding the physics behind shaped charge. I was told that shaped charges are the way they are because a hollow conical shape in the middle of an explosive will ...
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4answers
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Why did the apple explode when spun very fast?

This new video from the slow-mo guys captures the explosion of an apple when it is rotated really fast (roughly $109$ rotations per second). But can someone explain me why did it explode? Can we ...
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1answer
32 views

Is it possible to create a shockwave gun (Like in Minority Report) [closed]

I love the gun in Minority Report. It seems to send a shockwave that can throw people and objects back. The gun has a rotating mechanism that triggers the action and loads a charge. Here's it in ...
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2answers
342 views

What prevents fissile materials from fully undergoing nuclear fission?

As I have realised, most of the Uranium and Plutonium inside an Atomic Bomb do not actually fission together, even if the critical mass is used. In fact, for Little Boy, only 1.09 kg out of 64 kg of ...
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2answers
109 views

How thick would a steel container have to be to withstand a thermonuclear detonation?

We have a completely uniform, hollow sphere made of high-strength steel. Inside this sphere a Tsar Bomba (RDS-220) is detonated. How thick (ballpark figure) would the sphere need to be to withstand ...
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1answer
48 views

Was plutonium produced at Hiroshima?

As I understand, the Nagasaki plutonium was made in nuclear reactors by bombarding U238 with neutrons. There was about 20% of U238 in the gun-type U235 bomb at Hiroshima. Was this for reasons, or was ...
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2answers
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Would an atomic bomb detonate a uranium stockpile? [closed]

If a uranium atomic bomb directly hit a stockpile of weapons grade uranium, would the chain reaction also detonate the stockpile? what about a stockpile of nuclear reactor fuel rods? what about a ...
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1answer
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Creating a black hole with explosives? [closed]

Would it be possible to compress enough matter into a small enough space using explosives, using roughly the same concepts as a nuclear bomb? of course, this couldn't be done with traditional ...
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1answer
47 views

Where would the energy go if a nuke intercepted a meteor?

I thought of this question from watching the trailer for the new movie "Greenland" with Gerard Butler. Essentially in the trailer a huge comet falls towards the earth, apocalypse, etc. ...
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1answer
197 views

Beirut 2020 explosion vs a nuclear explosion with the same energy [closed]

Port Beirut disaster (ammonium nitrate explosion, 4 August 2020) was equivalent to 1.15 kt of TNT (4.4 TJ). It falls in the range of a small nuclear device (20 t TNT for the smallest, 15 kt TNT for ...
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1answer
118 views

Speed of particles in an exploded asteroid

An asteroid of mass $M$ explodes into a spherical homogeneous cloud in free space. Due to energy received by the explosion the cloud expands and the expansion is spherically symmetric. At an instant ...
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0answers
50 views

Speed of an explosion [closed]

If I am standing $10$ feet away from an explosion, what would hit me first? Shock wave, sound, shrapnel, etc (besides light!) If the shock wave was powerful enough, is it possible to be thrown out of ...
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Angle of shock from a horizontally propagating detonation?

In a recent video about the explosion during testing of the SpaceX protoype, Scott Manley analyzes the explosion, and when showing a frame-by-frame says of the apparent shock wave seen in the result: ...
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0answers
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Energy of Sagittarius A*'s Relativistic Jet

As far as I have known, our center of the Milky Way, the supermassive black hole Sagittarius A*, weighing 4,000,000 times the mass of our sun, had erupted 3.5 million years ago, the explosion of ...
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1answer
20 views

Terminal velocity of accelerated rain drop

Lets say an airplane flies above a cloud and drops a bomb that detonates inside the cloud. The detonation velocity is 6900m/s. Will a raindrop surrounding the detonation site be accelerated to ...
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1answer
23 views

Distance of a shrapnel ball with air resistance [closed]

How can we determine the distance a steel ball inside a grenade will fly horizontally taking into account air resistance? If we assume that the detonation velocity is 6900m/s(TNT), the ball has a ...
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1answer
45 views

What explosives work best with water? [closed]

What explosives work best with water? For Example: If there was an olympic pool and I dropped some explosive into it. With which explosive type would detonation velocity and pressure be most ...
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1answer
54 views

Physics of Project Orion

I was reading the book "Project Orion" by George Dyson. For those who are unaware, Project Orion was basically a plan to launch a spaceship by flinging bombs out the rear and detonating them. The ...
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1answer
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Water Droplet Size Explosion

How do I control the droplet size in a water balloon during a midair explosion? In other words: can the droplet size be influenced by the choice of explosive inside the water balloon?
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1answer
28 views

Correlation among the terms “convergence”, “accumulation” and “explosion” [closed]

I am developing an essay on music perception by approaching some mathematical and physical notions. As such, the term I am addressing and interested in is the "convergence", which pairs in mathematics ...
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0answers
49 views

Why did the Baker Shot have a normal mushroom cloud instead of a radial blast wave?

The US tested its first underwater nuclear device with the Baker Shot in Bikini lagoon. It was supposed to be identical to the Fat Man device dropped on Japan. However it was measured at 23 kt ...
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2answers
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Why doesn't Earth explode from the great pressure inside?

The inside of Earth is very hot, molten, and under incredible pressure. When small cracks form, the pressurized contents spill out and we get volcanoes and eruptions. So does that mean that with a ...
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1answer
81 views

Everything will not just turn into vapor in the ground zero of nuclear explosions but hydrogen plasma

Calcium atoms can't withstand extreme heat according to this link. http://abyss.uoregon.edu/~js/ast122/lectures/lec09.html "Why do some stars have strong lines of hydrogen, others strong lines of ...
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1answer
106 views

An asteroid strikes Earth. I’m skydiving. Do I die? [closed]

Let’s say I’m skydiving at a high altitude and, while falling, an asteroid strikes Earth. Is there a certain mass / momentum of the asteroid below which I would have a chance of surviving? Or would ...
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1answer
110 views

Possible to make a shaped charge with a nuclear weapon? [closed]

Ignoring the practicality of doing something like this, would it be possible to make a large scale shaped charge using nuclear weapons, or is there some limitation that makes this only possible with ...
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1answer
32 views

How can a chemical substance explode, producing only solid products?

Silver acetilyde, like some other salts of silver, is unstable and explodes with great force. However, unlike almost all other explosive compounds, it doesn't produce any gases - it only produces ...
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1answer
120 views

Hydrogen bomb without fission stage

The majority of existing nuclear warheads are Thermonuclear devices implementing the Teller--Ulam design. It includes a first stage of "traditional" nuclear fission explosive (Uranium and/or Plutonium)...
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3answers
69 views

In the fuel of atomic bombs when does neutron fission activity begin?

Do scientists first initiate neutron activity within the subcritical masses of fuel in the lab, or are the masses already undergoing some kind of minor neutron detachment naturally, or finally, is ...
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Chernobyl catastrophy

Reducing the power produces xenon that lowers the speed of nuclear reactions even more.Did the increasing of power by expelling the control rods trying to force the xenon to undergo fission had ...
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1answer
41 views

Why must there be a delayed ignition for a vapor cloud explosion?

I got this from the internet - “Ignition of the flammable vapor cloud must be delayed until a cloud of sufficient size has formed. If ignition occurs as the flammable material is escaping, a large ...
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3answers
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Why did my thermos flask/jug explode after stirring with a stainless steel spoon?

I always use a thermos jug when making tea. This time I filled the jug with tea leaves and hot water (around 100 degree celcius). I closed the jug and noticed that the tea was too weak therefore I ...
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1answer
81 views

Can a nuclear weapon destroy another nuclear weapon in flight? [closed]

I was thinking the other day, we have quite a few nuclear weapons in our arsenal. Say a country uses ballistic or cruise missiles on us. Can't you send up another nuclear weapon and detonate it within ...
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2answers
105 views

How are thermonuclear weapons possible?

Given the fact that thermonuclear devices are a mix of fission through enriched uranium whose energy initiates the fusion in surrounding deuterium. Question is (how come) fission raises temperature so ...
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1answer
58 views

How to simulate an explosion in space [closed]

I have a simulation of some bodies orbiting each other in space, and I would like to add explosions to it to see how the behave, but I don't know how to do it. Sorry if this is has been asked before, ...
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2answers
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Was Chernobyl Explosion a Small Nuclear Detonation?

The Chernobyl reactor was designed to produce a maximum of 3.2 megawatts of power. It is now estimated to have produced 3.2 gigawatts of power in the final second of its life. The original ...
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1answer
528 views

How to calculate speed of shrapnel based on explosive's speed of detonation?

I'm trying to calculate the initial speed of shrapnel from a grenade. Using the US's M67 hand grenade as a baseline/reference: Total mass: 400g Explosive's mass: 180g Explosive's detonation speed: ...
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2answers
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Nuclear-powered Ramjet + criticality

I came across this Wikipedia entry about Project Pluto; a nuclear-powered ramjet that the U.S. was developing back in the day. https://en.wikipedia.org/wiki/Project_Pluto This missile would have ...
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2answers
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Could you use the detonation of a Hydrogen bomb or atomic bomb to start a nuclear fusion reactor [closed]

Would this lead to a reactor that produced more energy than you put in?
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1answer
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Is it possible to destroy a typhoon by bombs?

When a typhoon is still on the ocean, if a big bomb or several bombs are thrown to it, maybe at the eye, or at the part where the wind circles fastest, can the bomb destroy the typhoon?
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Is $TdS = dU + PdV$ true at very high strain rates? (Thermodynamic equilibrium)

I have read some reports of scientists who are interested in equations of state for unreacted explosives. They want these equations of state to describe the mechanical response of an explosive as it ...
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2answers
239 views

How would a nuclear explosion really operate in outer space?

(Repost from RPG.SE, per the community's suggestion.) A friend recommended I post this question here - said I'd be more likely to get a useful response than, say, from Reddit. My question is: How ...
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What is the “explosion” caused by Hawking radiation, and how do you calculate its strength? [duplicate]

According to my limited knowledge of Hawking radiation, there is an "explosion" when the black hole fully radiates away. What is this explosion? Is it in the form of EM radiation only, or something ...
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3answers
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Waves generated in an explosion

A cracking furnace exploded in a petrochemical industry building near my city somedays ago. The building is more or less far from the city, and even so people could notice the explosion. The windows ...
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3answers
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Could the end cap of the Pascal B (1) survive its trip through the atmosphere?

In 1957, the US had a nuclear test where a shaft was dug 152 meters into the ground. A 100 mm thick, 900 kg steel plug was installed and welded at the top of the shaft. Under it was 2 feet of ...
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1answer
86 views

Trinity vs Nagasaki

From what I read the radiation levels in Nagasaki today are equivalent to the natural background radiation levels in the surrounding areas. On the other hand, the radiation levels at the Trinity test ...
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How can corium eating its way into water tanks cause a megaton scale explosion? [duplicate]

The 2019 miniseries "Chernobyl" appears to state that the "lava like" substance of melted radioactive matter from the core, the so-called "corium", could eat its way down into the water reservoirs ...

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