Question 1: At a height of ten meters above the surface of afreshwater lake, a sound pulse is generated. The echo from thebottom of the lake returns to the point of origin 0.175 s later.The air and water temperatures are 20 oC. How deep isthe lake?
Question2: A hunter is standing on flat ground between twovertical cliffs that are directly opposite one another. He iscloser to one cliff than the other. He fires a gun and, after awhile, hears three echoes. The second echo arrives 1.92 s after thefirst, and the third echo arrives 1.46 s after the second. Assumingthat the speed of sound is 343 m/s and that there are noreflections of sound from the ground, find the distance (in m)between the cliffs.
