Pls asap this questions are science questions ( biology chemistry physics)

46 i think a
47 i think d
49 i think a
50 i think a
51 idk
54 i think d
55 idk
56 idk
57 idk
58 i think d
59 idk
61 idk
62 i think a

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

How to tell if a molecule is polar or nonpolar with electronegativity

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?