What is the primary cause of diffusion? 1.that some substances can dissolve in solvents 2.heat added to a substance 3.random internal motion of atoms and molecules 4.attraction of opposite atomic charges

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?