Two submarines are moving towards each other in a portion of the Atlantic Ocean where the water is calm. Sub A is moving at 14.0 m/s and sub B is moving at 19.5 m/s. Sub A sends out a sound wave at 1.000 kHz and the speed of sound in the water is 1521 m/s.
(a) What frequency does sub B detect?
(b) What frequency is detected by sub A of the sound reflected from sub B? {1022 Hz, 1045 Hz}