Which of the following substances is a mixture? 1. CuSO4 (aq)
2. CO2 (g)
3. H2O(1)
4. Cu (s)

Thank u

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:

beta decay is the answer

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.