light with one wavelength is incident on a double slit for which the slit separation can be adjusted. As the separation between the slits increases does the separation between adjacent bright fringes in the interference pattern increase, decrease it stay constant? explain your answer

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

How to tell if a molecule is polar or nonpolar with electronegativity

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.