A car takes 2 hour to travel 300 km along a main road and then ½ hour to travel 30 km along a side road. What is the average speed of the car for the whole journey? also write steps

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

Most of the volume of an atom is occupied by the

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.