Questions tagged [explosions]

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2answers
54 views

May a star explosion be in that way weak that the expelled material gradually recollapse and form the star again?

May a star explosion be in that way weak that the expelled material gradually recollapse and form the star again? My question is not about would that explosion leave a neutron star as a remnant but ...
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1answer
51 views

Containing a nuclear explosion in space

Suppose we have a nuke as strong as tsar bomb in space. can we somehow contain the explosion? the same way we contain plasma in fusion reactors.
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Why does a blast wave travel faster than sound?

https://en.wikipedia.org/wiki/Blast_wave#Characteristics_and_properties says: "A blast wave travels faster than the speed of sound and the passage of the shock wave usually lasts only a few ...
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2answers
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Why does the momentum of the shrapnel of a resting bomb remain zero after the explosion?

The law of conservation of momentum says that the momentum sum of a closed system before an interaction of its objects remains the same after an interaction of its objects. If an astronaut in space ...
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1answer
48 views

Are the presense of neutron reflecters the only difference between a hydrogen bomb and a neutron bomb? [closed]

From what I understand, a hydrogen bomb usually has neutron reflectors, like graphite, to increase the yield of the explosion. A neutron bomb does not have those reflectors. Are there any other ...
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0answers
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Can water thermolyse in significant amounts?

According to Wikipedia water can thermolyse starting at around 1200 celcius, though the auto-ignition point of hydrogen is at around 535 celcius. I'm wondering in what sense water actually even ...
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2answers
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Why would packing molecules too close together cause an explosion?

I just watched this video, and around 75 seconds they say if king Midas touched a duck, and all of its atoms gained the necessary protons/neutrons/electrons to become gold, the duck would be 33x more ...
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1answer
51 views

Kinetic energy produced in an explosion

If there is a train moving at 2 m/s with a cannon attached to it loaded with a ball, and then the ball is launched from the train, how would one find the kinetic energy produced by the explosion if ...
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1answer
104 views

Is the weapon from GI Joe: Retaliation possible and accurate? [closed]

In the movie G.I. Joe: Retaliation a kinetic bombardment weapon was used to destroy several major world cities. Is that weapon possible and if so, is the destruction accurate? Note: I asked this ...
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1answer
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Shaped charges/explosive lenses and implosion in the Fat Man design for the Nuclear Bomb: how do these actually cause implosion? [closed]

This is gone into at some length but not much detail (that I could understand) in "The Making of the Atomic Bomb" by Rhodes. The basic story is that the Americans were having trouble getting ...
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What causes the bucket to launch in the air?

In this video potassium is dropped into the bucket and it reacts with the water present in the bucket causing an explosion within the bucket itself. I don't see how an internal explosion makes the ...
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5answers
109 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
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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
37 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
81 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
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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
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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
355 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
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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
53 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
95 views

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
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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
204 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
180 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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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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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
35 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
28 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
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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
60 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
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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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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
82 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
108 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
173 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
33 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
135 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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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
51 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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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
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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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109 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
63 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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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
868 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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