An audio technician wishes to determine the distance from ground to water level in a well by using an adjustable frequency oscillator in the audio range. Her assistant reports that she is able to establish two successive resonances at 51.26 Hz and 56.68 Hz. (Assume that the speed of sound in air is 343 m/s.) (a) How deep (in m) is the well? m (b) How many antinodes are in the standing wave at 51.26 Hz? antinodes