The figure below shows wave fronts of sound waves from the siren of a police car. Two people on both side of the car are running at 5 m/s to the left. The frequency of the siren is 400 Hz. The person on the left observes a frequency of 388.7 Hz. Speed of sound in air is 340 m/s. a) How fast is the policy car travelling? b) What is the frequency observed by the person on the right? c) What is the wavelength observed by the person on the righ?

A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 5.89 104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest insect a bat can detect?mm

Please have answers computer typed.

An observer is riding a bike with a speed of 5 m/s. The ice cream van emitting a sound with anatural frequency of 600 Hz is coming up from behind the cyclist with a speed of 25 m/s.The siren making the sound is inside the cabin with the ice cream vendor.a) What is the frequency of the sound heard by the ice cream vendor inside the vehicle?b) What is the wavelength of the sound waves as detected by the ice cream vendor inside thevehicle?c) What is the frequency of the sound heard by the cyclist?d) What is the wavelength of the sound waves as detected by the cyclist?

30 m from an ultrasonic sensor. The total travel time of the ultrasonic wave is 33 ms (milliseconds). What is the speed of sound in these conditions?

Early Doppler shift experiments were conducted using a band playing music on a train. A trumpet player on a moving railroad flatcar plays a 320-Hz note. The sound waves heard by a stationary observer on a train platform hears a frequency of 350 Hz. What is the flatcar’s speed in mph? The temperature of the air is TC = 22°C .

BF-4 Anabella is standing on the sidewalk as two fire engines traveling in the same direction pass her as shown below. Both fire engines produce the same frequency 1,500Hz. Engine #1 V₁=25.0m/s Anabella Engine #2 V₂=35.0m/s a) What is the frequency Anabella hears from engine #1? Use the speed of sound as 343.0m/s. b) What is the frequency Anabella hears from engine #2? Use the speed of sound as 343.0m/s. c) What beat frequency does Anabella hear?

You are hiking along a trail in a wide, dry canyon where the outdoor temperature is T=28.5 degrees celsius. To determine how far you are away from the canyon wall you yell "hello" and hear the echo t=3.05s later.   a) calculate the speed of sound in the valley in meters per second, assuming the speed at 0 degrees celsius is 332 m/s b) how far are you from the canyon wall, in meters? c) if you stood at the same point on a cold morning where the temperature was T2= -1.5 degrees C, how long would it have taken for you to hear the echo, in seconds?

A bat at rest sends out ultrasonic sound waves at 54.0 kHz and receives them returned from an object moving directly away from it at 33.0 m/s . What is the received sound frequency?

A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 7.69  104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest insect a bat can detect? ?mm