The colliding particles must have enough energy for the collision to be successful or effective in producing a reaction. The minimum amount of energy for a collision to be successful is called the ...

Back in the 80s, experts thought the moon was a result of an explosive collision with the protoplanet ... to Earth and this finding made the theory popular. With this in mind, it was concluded ...

IN various papers published during the last ten years Prof. Townsend has developed a theory of the ionisation of gases by collision, and has published experimental results which give it strong ...

A passenger jet hit an Army helicopter with three soldiers as the plane got ready to land at Reagan National near Washington, ...