The process which planetesimals combine with other planetesimals is called Accretion.
There are other names which refer to as accretion. For example, Accretion geology is termed as the increase in the size of a tectonic plate by addition of materials which convergent boundary.
Accretion atmosphere is termed as the process by which water vapor which is in clouds forms water droplets around nucleation sites.
Accretion astrophysics is termed as the formation of planets and other bodies through a collection of material through gravity.
D. There is not a point where the car doesn't move because the line didn't go flat at all so the car kept moving.
C. The velocity is postive
B.The average velocity is 50m/2sec
A.The graph tells us that the car didn't stop moving and the car didn't make kept moving forward it didn't go back
It has helped us by seeing what kind of things we can see with our eyes it also helps us by seeing mirco things like dirt
The awsner is cones....your welcome