A 1.5 kg block is connected by a rope across a 50-cm-diameter, 2.0 kg , pulley that spins on a frictionless axle, as shown in (Figure 1). A constant 10 N tension is applied to the other end of the rope. Starting from rest, how long does it take the block to move 30 cm ?

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