NS Imagine an alien spaceship and a human-controlled ship moving directly toward each other. An observer on Earth measures the both of their speeds as 0.710c with respect to the Earth. What is the speed of the alien ship with respect to the human ship? That is, what is the speed of the allen ship as measured by an observer in the human ship? Express your answer as a fraction of the speed of light, c. x What is the relative velocity relationship? Be sure to use the one that applies when the speeds of both objects with respect to a third observer (Earth) are known. Be careful with signs-remember that the velocities are in opposite directions. Remember the final answer should be the ratio of the speed (magnitude of velocity) to c. VAH