Arock occupies a volume of 2cm3 and has a mass of 54 grams. find the density of this rock.

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 •  

Does anyone have the answers to online physics course plato course physics, semester a v3.0

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem