a ball is attached to an ideal spring and oscillates with a period of 4.44s. the ball has a mass of 1kg and the spring constant is 2N/m. if the mass of the ball is doubled what is the new period

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

snell's law

refractve index = sin incidence / sin refraction