Scientists divide time into four main sections. two sections are the precambrian and the paleozoic. what are the other two sections?

a.
triassic and cenozoic

b.
pennsylvanian and mesozoic

c.
ice age and precambrian

d.
cenozoic and mesozoic

I think the answer D- the Cenozoic and Mesozoic

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.