The answer is D, because the collision's between molecules are elastic, not inelastic.
Answer:
0
Explanation:
m = Mass of person
g = Acceleration due to gravity = 9.81 m/s²
d = Vertical height from the ground
F = Force = Weight = mg
Net work done would be

Hence, the work done on the person by the gravitational force is 0
It means that if you had a cubic meter of water it would weigh 1000 kilograms
They will occupy less volume which will cause an increased density of the particles.