When does the given chemical system reach dynamic equilibrium?

What is the force of attraction between the particles in a salt crystal

What does the cell nucleus do or, how does it function?

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.