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14
votes
4answers
770 views

What determines the pitch of an explosion?

It's bonfire weekend here in the UK, and everybody is intent on shooting fireworks. I was wondering, what determines the pitch of the sound produced by an explosion? The sound has clearly a ...
9
votes
3answers
225 views

Explosion in space

I'm curious about what happens if an explosive substance detonates in space. On Earth, I guess a good chunk of the energy released is carried away by shock waves in the atmosphere. But in space, the ...
7
votes
3answers
879 views

2013 Russian meteor event, Sonic Boom or Explosion Boom?

In the lastest meteor event in Russia there was a big BOOM heard long after the meteor had passed. In this youtube video we can see at 4:30 the Meteor passing.. then hearing the BOOM at 7:00 , 150 ...
4
votes
2answers
561 views

If you throw dynamite into a pool of lava, will it explode or melt?

I was playing a table-top rpg with a friend. It was set... well it was pretty weird, so I won't get into it. Suffice it to say the bad guy had a stick of dynamite and we were on a volcano. I hit the ...
4
votes
1answer
667 views

short circuit an alkaline battery

i'm not doing anything related to physics, but i'm just curious : What really happen when i short circuit an alkaline battery ? some article in the net shown that fire/explosion can be happened when ...
4
votes
0answers
169 views

How does nuclear war look like from space?

As today's the 29th anniversary of possible Armageddon, had Mutual Assured Destruction taken place, with the USA and USSR exchanging most of their nuclear arsenal, what would someone In low earth ...
3
votes
1answer
352 views

Question about a nuclear bomb test photo

What are those white lines connecting the ground to the sky on the left side of this photo? I've see these before in the nuclear bomb test films too. They're apparently already in place upon ...
3
votes
2answers
218 views

How many grams of explosive are equivalent to the energy in a battery?

In the movie Terminator 3: Rise of the Machines, Arnie's fuel cells were twice shown to be extremely devastating when their stored energy was released. In real life, how many grams of, say, gunpowder ...
3
votes
1answer
156 views

How can you tell a model explosion from the real thing?

Movies and TV shows frequently show buildings being bombed, cars blowing up, etc. Frequently these are really explosions of miniatures filmed up close. Aside from the speed that the explosion ...
3
votes
2answers
283 views

Alcohol inside a container

Let's imagine a plastic container completely closed. We put alcohol inside it filling it at half. Now we make a hole to introduce 2 little Conductor one near the other so that they don't let the air ...
2
votes
1answer
2k views

Basic explosion physics - determining force

I'm using a game engine that has a ton of physics stuff built in. What I am currently trying to do is to simulation an explosion with F force in an x,y coordinate system and figure out how other items ...
1
vote
3answers
140 views

What's driving the bucket up?

Just saw this cool video from Plymouth University, which I actually found through Matthen's blog. They fill a plastic bottle with liquid nitrogen, screw the cap on, drop it in a bucket full of warm ...
1
vote
2answers
210 views

Antimatter bomb

I stumbled upon this wikipedia article on antimatter weaponry. Being greatly appalled by the sad fact that large sums of money are being wasted on this, I could not stop myself from thinking for a ...
1
vote
0answers
68 views

scaling laws for density and temperature of high-energy explosions

I'm wondering if there are heuristic ways to derive how the peak density and temperature of nuclear explosions scale with the amount of fissile/fusible material. Does it matter what the explosion ...
0
votes
3answers
179 views

the sounds of an exploding star

We know that space cannot spread a sound wave as there is no "air" or a medium that would support the spread of a sound wave. However if we put ourselves in the vicinity of an exploding star, would it ...
0
votes
2answers
1k views

What would happen after the collision matter and the anti-matter [duplicate]

Possible Duplicate: What actually happens when an anti-matter projectile collides with matter? Suppose 1 kg of a stray meteorite anti-matter moves to the earth. What would happen after ...
0
votes
1answer
49 views

Why does a lump of explosive burn's with an explosion?

When we light a solid lump of explosive it burns slowly layer by layer, but when we light up powder form of explosive it just burns with a huge explosion and sound why does it happen. And one more ...
0
votes
2answers
147 views

Remnant of a supernova

i explain better A supernova remnant is the structure resulting from the explosion of a giant star . The supernova remnant is surrounded by an expanding shock wave that is formed from material ...
0
votes
0answers
54 views

How strong are Hydrogen bombs? [closed]

Yes I searched for answers on Google and here if you must ask. (Story begins) My question is about Hydrogen Bomb a.k.a. H-Bomb. On history class teacher told us that two atomic bombs where thrown on ...
0
votes
0answers
99 views

Spontaneous explosion of a bottle containing alcohol and milk [closed]

Cross-posted at Chemistry SE A friend of mine gave me a bottle of home-made liquor which is a concoction of pure alcohol and sweetened milk. I accepted his gift happily and then I put the bottle ...
-1
votes
1answer
36 views

If An Object Explodes With A Force, What Force Are Fragments Given?

So let's say for example I have an object with 5kg of mass. It explodes with a force of 500N. The object fragments into four fragments: a 0.5kg, a 1kg, a 1.5kg and a 2kg object. What force does ...