A100-kg person sits on a 5-kg bicycle. the total weight is borne equally by the two wheels of the bicycle. the tires are 2.0 cm wide and are inflated to a gauge pressure of 8.0 × 105 pa. what length of each tire is in contact with the ground?

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.