The relationship between gravitational force and distance of separation is an "inverse relationship".
<u>Explanation:</u>
Gravitational force has been explained by "Newton's Universal Law of Gravitation" which says "In this universe every single particle attract every other particle with a force which directly proportional to the product of their masses while inversely proportional to the square of the distance in between them".
The gravitational force is inversely proportional to square of distance because as the distance between the objects with masses increases the force decreases. The gravitational force between any two objects with masses can be understood by given formula:

Here the F is gravitational force,
G is the gravitational constant = 
are the masses of the two objects
d is the distance between two objects.
force acting on the object is given as

initial and final positions are given as


now the displacement is given as



now the work done is given as



so there is no work done
In a liquid, particles are close together, moving rapidly with random motion. The particles collide with each other more frequently compared to gases.
Answer:

Explanation:
The motion of the bullet is a uniformly accelerated motion, therefore we can find its acceleration by using the following suvat equation:

where
v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance covered
For the bullet in this problem:
u = 350 m/s is the initial velocity of the bullet
v = 0 is the final velocity (the bullet comes to a stop)
s = 0.125 m is the stopping distance of the bullet
Therefore, by solving the equation for a, we find its acceleration:

And the negative sign tells that the direction of the acceleration is opposite to that of the velocity.
D.) Entropy
Entropy is the measure of disorder in the universe.