A football kicker is attempting a field goal from 27m from the goal post. The ball is kicked and just clears the crossbar 3.3 s later. If the angle of the kick was 45°, what was the initial speed 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