Which of the following is an application of Newton's Third Law of Motion? A. A skydiver falls away from a plane toward the ground.
B. A truck accelerates more slowly when it is fully loaded than when it is empty.
C. A ball sits on the ground until a player kicks it. The nonzero net force sets the ball in motion.
D. A rocket can accelerate when it pushes gas backward. The reaction force pushes the rocket forward.

C

Explanation:

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since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

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