PLEASE HELP 30 POINTS Using the H-R diagram provided, plot points on the given graph for the stars you researched. Use the circle tool to plot a point. Use the text box tool to label each point with the appropriate star name.

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •