Answer:

Explanation:
It says “Momentum before the collision is equal to momentum after the collision.” Elastic Collision formula is applied to calculate the mass or velocity of the elastic bodies.












Answer:
Globular star clusters are located in the great spherical halo.
Explanation:
Hope this helps! :)
Answer:
13.1
Explanation:
that's what I'm gonna go with, but u can research more
Answer:
Yes
Explanation:
There are so many planets out there that there must be habitable planets if not in our galaxy but the Universe.
Although the chances of advanced life are slim, small primitive life like microbes or sea life may still exist.