A. You are driving on the freeway at 100 km/h when you see an ambulance approaching...
A. You are driving on the freeway at 100 km/h when you see an ambulance approaching you from ahead at 120 km/h with its siren on. The frequency of the siren is 1 kHz. Taking the velocity of sound to be 345 m/s, what is the perceived frequency of the ambulance siren as the ambulance moves towards you? What is the perceived frequency of the ambulance siren as the ambulance moves away from you?
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A. You are driving on the freeway at 100 km/h when you see an
ambulance approaching...
(a) What frequency is received by a person watching an oncoming ambulance moving at 130 km/h...
(a) What frequency is received by a person watching an oncoming ambulance moving at 130 km/h and emitting a steady 773 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
Standing at a crosswalk, you hear a frequency of 510 Hz from the siren of an approaching ambulance. After the ambulance...
Standing at a crosswalk, you hear a frequency of 510 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 433 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.)
You are driving down the road at 15.6 m/s (35 mph) when an ambulance passes you...
You are driving down the road at 15.6 m/s (35 mph) when an ambulance passes you with its siren blaring. The ambulance siren produces a frequency of 700 Hz. As the ambulance approaches you from behind, you hear a frequency of 730 Hz . The speed of sound in air is 344 m/s. What is the speed of the ambulance? The positive direction points from your car (listener) toward the ambulance (source). Express your answer in meters per second.
A person watches an ambulance drive by them while emitting a steady sound from its siren....
A person watches an ambulance drive by them while emitting a steady sound from its siren. When the ambulance passes the person (switching from moving towards him to moving away from him), the perceived frequency of the sound he receives decreases by 7.23 percent. How fast is the ambulance driving? Give your answer as a positive number. Assume room temperature air (343m/s)
A woman is sitting at a bus stop when an ambulance with a siren wailing at...
A woman is sitting at a bus stop when an ambulance with a siren wailing at 316 Hz approaches at 63 miles per hour (mph). Assume the speed of sound to be 343 m/s. a) How fast is the ambulance moving in meters per second? (perform the necessary unit conversion) vs= 63 mph = b) What frequency does the woman hear? fa = _______ Hz c) What speed (vs) would the ambulance be traveling in order for the woman to...
(2) While out on a call for GERMS, an EMT hears the sound of an ambulance...
(2) While out on a call for GERMS, an EMT hears the sound of an ambulance ap- proaching. The EMT is completely stationary. It is quite an emergency, so the ambulance is approaching at 55 mph and emitting its siren at a frequency of 1200 Hz. (a) What is the frequency heard by the EMT? (b) What is the frequency heard by the hospital away from which the ambulance is moving? (c) What is the frequency of the echo off...
1. What is the speed of the ambulance v_s? 2. What is the frequency of the...
1. What is the speed of the ambulance v_s?
2. What is the frequency of the siren at its source f_0?
3. What is your initial speed v_o?
You are jogging along a straight road one day at constant velocity vo when you hear the siren of an ambulance approaching from behind. The frequency you hear is f-756 Hz You stop to take a break and the frequency you hear changes to f2 765 Hz The ambulance then overtakes you...
14. You are driving an ambulance through traffic at 10 m/s to the scene of a...
14. You are driving an ambulance through traffic at 10 m/s to the scene of a vicious cheetah attack. A police car is already there. Both the ambulance and the police car have sirens that generate 800 Hz tones. When you are 1 km away, the police siren's loudness is approximately 40 dB. a. (6 points) How far are you from the police car when it's siren's loudness is 86 dB? -TP unt b. (6 points) As you approach, what...
An ambulance is moving with a velocity of 45.0 m/s. The siren has a frequency of...
An ambulance is moving with a velocity of 45.0 m/s. The siren has a frequency of 130 Hz. The temperature of the air outside is 90° F a) What frequencies are observed by a stationary person on the sidewalk as the ambulance approaches and after it passes? b) The ambulance now stops and you run towards it at 4.0 m/s along the sidewalk. What is the frequency you observe? c) The sound intensity level of the siren is 110 dB....
You are jogging along a straight road one day at constant velocity vo when you hear...
You are jogging along a straight road one day at constant velocity vo when you hear the siren of an ambulance approaching from behind. The frequency you hear is f1 = 756 Hz. You stop to take a break and the frequency you hear changes to f2 = 765 Hz. The ambulance then overtakes you and speeds away, and the frequency you hear is f3 = 680 Hz. The speed of sound in air is vsound = 340 m/s and...
(a) What frequency is received by a person watching an oncoming ambulance moving at 130 km/h and emitting a steady 773 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
(2) While out on a call for GERMS, an EMT hears the sound of an ambulance ap- proaching. The EMT is completely stationary. It is quite an emergency, so the ambulance is approaching at 55 mph and emitting its siren at a frequency of 1200 Hz. (a) What is the frequency heard by the EMT? (b) What is the frequency heard by the hospital away from which the ambulance is moving? (c) What is the frequency of the echo off...
1. What is the speed of the ambulance v_s?
2. What is the frequency of the siren at its source f_0?
3. What is your initial speed v_o?
You are jogging along a straight road one day at constant velocity vo when you hear the siren of an ambulance approaching from behind. The frequency you hear is f-756 Hz You stop to take a break and the frequency you hear changes to f2 765 Hz The ambulance then overtakes you...
14. You are driving an ambulance through traffic at 10 m/s to the scene of a vicious cheetah attack. A police car is already there. Both the ambulance and the police car have sirens that generate 800 Hz tones. When you are 1 km away, the police siren's loudness is approximately 40 dB. a. (6 points) How far are you from the police car when it's siren's loudness is 86 dB? -TP unt b. (6 points) As you approach, what...
An ambulance is moving with a velocity of 45.0 m/s. The siren has a frequency of 130 Hz. The temperature of the air outside is 90° F a) What frequencies are observed by a stationary person on the sidewalk as the ambulance approaches and after it passes? b) The ambulance now stops and you run towards it at 4.0 m/s along the sidewalk. What is the frequency you observe? c) The sound intensity level of the siren is 110 dB....
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