What is the purpose of the three r’s of resource management? a. to remove resources from homes b. to conserve resources c. to consume increasing amounts of natural resources d. to spread out landfill areas

Anybody wanna ? (picture included? )

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 •  

If the area of a square has increased by a factor of 16, by how much has each side increased?