What is the linear speed of a point on the edge of a 0.30 m diameter grinding wheel rotating at 1600 rpm.
what is the acceleration of the point?

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