According to you what is living? The first thing that comes to our mind is to grow? The increase in mass and number is said to grow but is it true? Do non-living don't grow? Imagine an old mountain that...
There are 3 Types of Collisions Elastic, Inelastic and Totally Inelastic collision. Momentum is conserved in all these three types ( No external force is involved, so the system is called a Closed System....