A driver travels northbound on a highway at a speed of 20.0 m/s. A police car, traveling southbound at a speed of 38.0 m/s, approaches with its siren producing sound at a frequency of 2500 Hz. (a) What frequency does the driver observe as the police car approaches? (b) What frequency does the driver detect after the police car passes him?

Answer Please

the siren of a fire truck that is traveling northward at 40.0 m/s emits a sound wave of frequency 3000 Hz. a car in front of the truck is also traveling northward at 20.0 m/s. the temperature of the calm air outside (not windy) is 10.0 degrees Celcius. (a) what is the frequency of the siren's sound that the car driver hears? (b) what is the frequency of the siren's sound that the fire truck driver hears reflected from the car in front of it?

A ship mapping the depth of the ocean emits a sound of 37 kHz. The sound travels to the ocean floor and returns 0.65 s later. (a) How deep is the water at that location? (b) What is the wavelength of the wave in water? (c) What is the wavelength of the reflected wave as it travels into the air, where the speed of sound is 350 m/s?

A convertible with the top down is traveling north on a road at a speed of 21.0 m/s. A police car, traveling south at a speed of 40.0 m/s, approaches with its siren producing sound at a frequency of 2500 Hz. (Enter your answers in Hz. Assume that the speed of sound in air is 343 m/s.) (a) What frequency does the driver of the convertible observe as the police car approaches? (Enter your answer to the nearest integer.) Hz (b) What frequency does the driver of the convertible detect after the police car passes her? Hz (c) Repeat parts (a) and (b) for the case when the police car is traveling northbound. while police car overtakes after police car passes Hz Hz

Doppler Effect: A factory siren indicating the end of a shift has a frequency of 80 Hz where the speed of sound in air is 343 m/s. a)What frequency is perceived by the occupant of a car that is traveling at 30 m/s towards the factory? b)What frequency is perceived by the occupant of a car that is traveling at 30 m/s away from the factory?

A bat is flying at 7.00 m/s and is emitting cries at a frequency of 82.0 kHz. It is chasing amoth and is detecting the echoes from the moth. Moths fly somewhat erratically.(a) Calculate the frequency detected by the bat when the moth is stationary(b) flying at 1.00 m/s in the same direction as the bat(c) flying at 2.00 m/s toward the bat

(a) What frequency (in Hz) is received by a person watching an oncoming ambulance moving at 108 km/h and emitting a steady 950 Hz sound from its siren? The speed of sound on this day is 345 m/s. Hz (b) What frequency (in Hz) does she receive after the ambulance has passed? Hz

(a) What frequency is received by a person watching an oncoming ambulance moving at 105 km/h and emitting a steady 753 Hz sound from its siren? The speed of sound on this day is 345 m/s. Hz(b) What frequency does she receive after the ambulance has passed? Hz

(a) What frequency is received by a person watching an oncoming ambulance moving at 130 km/h and emitting a steady 733 Hz sound from its siren? The speed of sound on this day is 345 m/s. Hz (b) What frequency does she receive after the ambulance has passed? Hz