1-A large rock (with greater mass) and a basketball are dropped from the roof of the East Middle School gymnasium at the same time. Assume air resistance is the same on each object.
Which object will hit the ground first? Explain.

Provide more information for : )

Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.

The independent is what is changed, the dependent is was is measured or the reaction.