1.) When a single transverse wave pulse is propagated down the slinky to a stationary end point, this wave is reflected back toward the origin. If you oscillate the end of the slinky to procure repeated transverse wave pulses, what happens when a new outgoing wave pulse encounters a reflected wave pulse on its way back? 2.) If a tree falls in a forest and no one is around to hear it, does it still make a sound? Why or why not? Discuss the reasoning based on the physics definition of sound. 3.) How do bats use echoes to catch prey? 4.) suppose a bat is using echolocation to hunt a moth and it enters a cave where the temperature is substantially lower than just outside the cave. In what ways would the drop in temperature drop impact the bat's ability to determine the distance between itself and the moth? Do you think being in an enclosed space will interfere with the bat's echolocation of the moth? Why or why not