Notice that it wasn't necessary to compute the velocity gained upon leaving the spring: only the mechanical energy at each of the two points of interest was required, where the block was at rest. QUESTION A real spring will continue to vibrate slightly after the mass has left it. How would this affect the results

b would be the answer

b.transmitters send radio waves, and receivers capture radio waves.

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.