Initials 4. A car, moving at 50 m/s towards a person honks its horn. The person...
A car moving away from a cyclist at 18.0 m/s sounds its 550 Hz horn. The cyclist is moving away from the car with a speed of 7.20 m/s. A) What is the apparent frequency heard by the bicyclist? B) What is the apparent frequency if the car is moving towards the bicyclist if all other conditions remain the same?
An ambulance moving at 43 m/s sounds its siren whose frequency is 400 Hz. A car is moving in the same direction as the ambulance at 19 m/s. (a) What frequency does a person in the car hear as the ambulance approaches the car? Hz (b) What frequency does a person in the car hear after the ambulance passes the car? Hz
An ambulance sounding its siren with a frequency of 1550 Hz is traveling along a straight road with a speed of 34 m/s. Two cars are ahead of the ambulance in an adjacent lane. One car has completely stopped. A second car continues to travel in the same direction as the ambulance with a speed of 20 m/s. (a) Which of the two cars hears the highest pitch coming from the ambulance? Explain. (b) Suppose the driver of the stationary...
An ambulance moving at 41 m/s sounds its siren whose frequency is 490 Hz. A car is moving in the same direction as the ambulance at 24 m/s. (a) What frequency does a person in the car hear as the ambulance approaches the car? _________Hz (b) What frequency does a person in the car hear after the ambulance passes the car? __________Hz
A car sounding its horn (rated by the manufacturer at 600 Hz) is moving at 15.0 m/s toward the east. A stationary observer is standing due east of the oncoming car. 1) What frequency will he hear assuming that the speed of sound is 343 m/s? (Express your answer to two significant figures.) 2) What if the observer is standing due west of the car as it drives away? (Express your answer to two significant figures.)
An ambulance driver traveling at 32.0 m/s (71.6 mph) honks his horn as he sees a motorist ahead on the highway traveling in the same direction. The motorist hears a frequency of 392 Hz and notices that his own speedometer reads 33.6 mph (15.0 m/s). Calculate the frequency that the ambulance driver hears. (Speed of sound is 340 m/s) (in Hz)
A car's horn produces a frequency of 440 Hz at rest.If the car is traveling east at 20 m/s towards an observer, what speed and direction (E or W) must an observer have to hear a frequency of 450 Hz?
A train is moving at 23 m/s east when it blasts its horn at a frequency of 164 Hz. what frequency is heard by the driver of a car moving east at 15 m/s along a road parallel to the tracks? the speed of sound is 343 m/s.
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3. (4 points) The speed of sound in a container of hydrogen at 201 K is 1,220 m/s. What would be the speed of sound if the temperature were raised to 405 K? Assume that hydrogen behaves like an ideal gas. U= 5. (4 points) A car is moving 32.3 m/s towards a pedestrian who is at rest. The driver honks the horn, producing a sound with a frequency of 9100-Hz. What frequency does the...
6.) A person holding a 325 Hz tuning fork walks towards a wall at 1.33 m/s. What beat frequency is heard by the person due to the difference in frequency of the tuning fork and its echo off the wall? (Hint: The person is a moving source, but they still hear the tuning fork at the original frequency). (2.5 Hz)