The atomic radius of a hydrogen atom is 53 pm. The radius of a golf ball is 21.35 mm. If the hydrogen atom was blown up to the size of the golf ball, how big would the radius of the golf ball be if the original size ratio is maintained

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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.