An Imperfect, Unenclosed World                                         Sadly, a perfectly enclosed system is usually not the condition we see our explosions take place in. Because of this, when calculating things like the energy released from  the initial explosion and the movement patterns of the particles. As you can see from the image on the right, it's not as simple as all of the force going into the particles and explosion, the are many factor to take into account such as sound, gravity, air resistance and more! Even with all of these things, we can still get close by taking into account these external forces and dissipation of system energy by adding additional parameters to our equilibrium calculations to get a much more accurate answer.