What is Explosions: Definition and 66 Discussions

An explosion is a rapid expansion in volume associated with an extremely vigorous outward release of energy, usually with the generation of high temperatures and release of high-pressure gases. Supersonic explosions created by high explosives are known as detonations and travel via shock waves. Subsonic explosions are created by low explosives through a slower combustion process known as deflagration.

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  1. A

    How Is Kinetic Energy Distributed in an Explosion with Unequal Mass Fragments?

    Homework Statement An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. If 7400 J were released in the explosion, how much kinetic energy did each piece acquire? Homework Equations Momentum? Kinetic Energy? The Attempt at a Solution I...
  2. V

    Uranium and supernovae explosions

    Do supernova explosions produce lumps of uranium or atoms of uranium?
  3. siddharth

    Fuel tank explosions in aircrafts

    I read about incidences of fuel tank explosions in commercial airliners recently. (For example, this http://www.cnn.com/2006/US/07/14/twa.main/index.html" ). I'm aware of four incidences of fuel tank explosions on commercial airliners. All four were on Boeing airplanes. - The first was in...
  4. R

    Detecting Spectral Lines in Explosions

    Hi All, I am working on a sensitivity model for a short wave IR spectrometer. And I have come up to a few questions that I had never thought of before and that seem really interesting (and I still don't know the answers, so it'd be great if anyone had any insight!) Well, I need to look at an...
  5. C

    Understanding Nuclear Explosions

    Nuclear bomb? Today my friend sent me a vid showing nuclear explosions and I was wondering what makes the huge explosion... I kind remember something from NOVA about how its the nuclear bond that connects the protons and nutrons that is realzed and that's what makesthe huge explotions and...
  6. W

    Computing the released energy of several nuclear explosions

    Hey, I'm new here. After looking around i think this is the right place to post this question thread. I'm interested in a hypothetical question. I know that the EMT formula to calculate the energy released from a nuclear explosion is = Y to the power 2/3 where Y = megatons. What I'm...
  7. V

    Are explosions soley the result of expanding gas?

    It's being said that the explosive property of nitrogen-containing compounds comes mainly not from release of heat, but from the fact that a few molecules of solids convert to many molecules of gas. And molecules of gas tends occupy so much more space than the solid. What I'm wonder about is...
  8. L

    1 to 2 Interactions, or explosions

    1 to 2 Interactions, or "explosions" I'm stuck doing this problem on my physics homework.. it's different than the type of problems we have been doing in class, and he hasn't taught us the equation to solve this question. The problem is: Tim, mass 50.00 kg, is riding a skateboard, mass 2.00...
  9. C

    Explosions: Physics, Forces & Energy - Ask Critical_Bill13

    I was wondering if anyone could tell me the forces acting on debris from an explosion, and the types of energy involved?? id really appreciate emailed answers-my email address is critical_bill13@hotmail.com Thanks very much for any replies! :smile:
  10. K

    Explosions in Space: No Use in Space?

    what use would a nuke be in space? Other than EMP, the heat, and the radiation, there's nothing about the explosion that would have effect. I mean, the only reason an explosion is and explosion is that it compresses the air around it. so what's the use?
  11. D

    Question about pressure explosions

    Hi, now, I've observed liquid nitrogen in a closed plastic bottle, will eventually explode pretty violently once the pressure gets high enough (that's what I'm assuming happens, the nitrogen gets warmer which increases the pressure, plus it goes from liquid to gas form). But my question is this...
  12. Pengwuino

    How do Hollywood SFX teams create realistic bullet hits and sparks in movies?

    Does anyone know how hollywood makes it look like a bullet hit... whatever it hit? I know they use blood packets for when it hits bodies but let's say a bullet 'hits' a box, you see a big puff of debris come out where the bullet entered (not even what happens in real life right?).. how od htey...
  13. S

    Physics Project: Exploring Potato Gun Explosions

    For a physics project, I really want to do something with an explosion in it, but I can really only come up with one practicable idea - a potato gun. Practicable meaning, an idea that won't cost me much more than 2 hundred dollars in instruments and materials. I plan to find out how much energy...
  14. F

    How Does Conservation of Momentum Apply in a Three-Part Explosion?

    I'm having trouble solving this: Vessel at rest explodes. There's 3 pieces. Two pieces, one with twice the mass of the other, fly off perpendicular to one another with the same speed of 31.4 m/s. The third piece has three times the mass of the lightest piece. Find the magnitude and direction...
  15. M

    How Does Conservation of Momentum Determine the Movement of Explosion Fragments?

    Homer the human powder keg, initially at rest, suddenly explodes into 3 pieces each with = mass. One piece moves east at 30 m/s and a second piece moves at 30 m/s south east a) calculate the speed of the 3rd piece and direction Problem I'm having is I can't find the angles because they are...
  16. M

    Calculating Momentum in Explosions

    Need help on this problem - exactly as stated Homer the human powder keg, initially at rest, suddenly explodes into three pieces each with equal mass. One piece moves east at 30 m/s and a second piece moves at 30 m/s southeast. Caculate the speed of the third piece and calculate the...
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