At a height of ten meters above the surface of a freshwater lake, a sound pulse is generated. The echo from the bottom of the lake returns to the point of origin 0.122 5 later. The air and water temperatures are 20 DC. How deep is the lake? Number n Units v At a distance of 3.24 m from a siren, the sound intensity is 5.18 x 102 W/m2. Assuming that the siren radiates sound uniformly in all directions, find the total power radiated. Number i UnitsTwo trucks travel at the same speed.They are far apart on adjacent lanes and approach each other essentially head-on. One driver hears the horn of the other truck at a frequency that is 1.12 times the frequency he hears when the trucks are stationary. If the speed of sound is 343 m/s, at What speed is each truck moving? Number n Units V