If a light ray enters a 6m corridor at an angle of 45 degrees, where would we place the mirror to get the light ray to make it out of the corridor.

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.

there are no components of a physical goal mentioned on the list of choices that you've provided.