An ambulance is traveling north at 56.7 m/s, approaching a car that is also traveling north at 36.4 m/s. The ambulance driver hears his siren at a frequency of 726 Hz. Ambulance 56.7 m/s 36.4 m/s Car What is the wavelength at any position in front of the ambulance for the sound from the ambulance’s siren? The velocity of sound in air is 343 m/s. Answer in units of m. 002 (part 2 of 2) 10.0 points At what frequency does the driver of the car hear the ambulance’s siren? Answer in units of Hz.

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.