Abaseball has a mass of 145 g. a bat exerts a force of 18,400 n on the ball. what is the acceleration of the ball?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th