The gold foil experiment demonstrated that 1) Electrons travel in circular paths around the nucleus
2) Electrons and protons are distributed evenly throughout the atom
3) Electrons are small, negative particles
4) Atoms are mostly empty space with a small, dense, positive center

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

i think that the answer is c