An object is projected into the air with a velocity of 32m/s with a 30° inclination from the ground. what is it's height when the velocity of the object is 30m/s and what is the direction of the velocity after 1.6 seconds of motion?

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