Why does the population graph level out and then decline a bit? Is that pattern certain? What is it based on?

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

Define the terms moral development and moral reasoning.