A sonar signal leaves a submarine, travels through the water to another submarine and reflects back to
the original submarine in 4.00 s. If the frequency of
the signal is 512 cycles per second and the
wavelength of the signal is 2.93 m. How far away is
the second submarine?

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength