joshuasanders7483 joshuasanders7483 09-01-2024 Physics contestada A jet engine emits a sound of frequency 3000 Hz. When the engine is moving directly away from the observer at half the speed of sound (speed of sound = 340 m/s), the observer hears a frequency of: (Multiple Choice Question)a) 1500 Hzb) 2000 Hzc) 2500 Hzd) 3000 Hz