(a) at an air show a jet flies directly toward the stands at a speed of 1200 km/h, emitting a frequency of 3500 hz, on a day when the speed of sound is 342 m/s. what frequency is received by the observers? (b) what frequency do they receive as the plane flies directly away from them?

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

Ared apple is illuminated by a blue light the apple will appear

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s