#$&* course Phy 202 3/20 10amI don't know what happened to the first message. Estimated red average time between collisions is 3 (unknown units)and the estimated time is 3-4 seconds. The mass of the blue ball is greater so its slower. In the Windows version I downloaded I have not experienced the red ball turning yellow but I would assume that it would be combining its property with the green ball which causes the color change. The graph of the balls represent a confined space or vacuum tube of particles moving around bouncing off the edges.