Agood model of the cell membrane would be
a. a chain link fence.
b. a film of food wrap.
c. a wall of stones and mortar.
d. a river with objects floating in it.

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

The process of a material going through a change of state from a gas to a liquid

Amoving freight car collides with an identical one that is at rest. if momentum is conserved, what happens to the second car after the collision? it attains the same speed as the first car. it moves at half the speed of the first car. it moves at twice the speed of the first car.