Which statement best explains the backward motion of the boat as the person moves forward

a: every mass exert a force on every other mass
b: an object at rest tends to stay at rest
c: friction opposes the motion of an object
d: for every action there is an equal and opposite reaction

How will the emission of an alpha particle affect the atomic number of an atom

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?