frequency = speed/wavelength. Thus,wavelength = 1530/7 = 218.57 m.
The wavelength can be calculated using the formula: wavelength = speed of sound / frequency. Plug in the values: wavelength = 1530 m/s / 7 Hz = 218.57 meters. Therefore, the wavelength of a 7 Hz wave in sea water is approximately 218.57 meters.