A continuous sound of frequency 1000 Hz travels along an iron rail. The speed of sound is 5200 m/s in iron, 340 m/s in air, and 1500 m/s in water. The sound exits the rail into the surrounding air and then enters a nearby pond.
(a) Calculate its wavelength in iron.
(b) Calculate its wavelength in air.
(c) Calculate its wavelength in water.