Gerry is looking at salt under a powerful microscope and notices a crystalline structure. What can be known about the salt sample Gerry is looking at? A. The atoms have spread out from each other.
B. The atoms are sliding past each other.
C. The atoms have no particular pattern.
D. The atoms are vibrating in place.

it's c. elements are placed in rows based on how may valencies electrons have.

c. is the answer

by love gaming

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied