Mrs. LibanQuestions for Thoughts: Chapter 51.What is a wave? 2.Is it possible for a transverse wave to move through air? Explain. 3.A piano tuner hears three beats per second when a tuning fork and a note are sounded together and six beats per second after the string is tightened. What should the tuner do next, tighten or loosen the string? Explain. 4.Why do astronauts on the Moon have to communicate by radio even when close to one another?