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 there is no wind. The ambulance is moving at constant velocity vs, and the frequency of the siren at its source is f0. Answer the following questions.
1. What is the speed of the ambulance vs?
2. What is the frequency of the siren at its source f0?
3. What is your initial speed vo?
4. After resting a bit you start running again in the same
direction as before but at half the speed. That is, your speed is
v'0 = v0/2. What is the
frequency that you will hear?
Homework Answers
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You are jogging along a straight road one day at constant
velocity vo when you hear...
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...
you are driving along a highway at 35.0 m/s when you hear the siren of a...
you are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind at constant speed and you perceive the frequency as 1310 Hz. you are relieved that he is in pursuit of a different driver when he continues past you, but now you perceive the frequency as 1240 hz. what is the frequency of the siren in the police car? the speed of sound in air is 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.
2. (19 points) You are driving along a highway when you hear the siren of a...
2. (19 points) You are driving along a highway when you hear the siren of a police car driving at approaching you from behind, and you perceive the frequency as 1320 Hz. You are relieved that he is in pursuit of a speeding Porsche 911car when he continues past you, but now you perceive the frequency as 1265 Hz. (The speed of sound in the air is 344 m/s.) m/ a) What is the frequency of the siren in the...
You are walking along a small country road one foggy morning and come to an intersection....
You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren. As a paramedic, you know that the siren sounds at a frequency of 7.87 kHz. But, as an amateur musician with perfect pitch, you can tell that the frequency you are hearing is actually 8.51 kHz. Is the ambulance moving toward or away from you? O away O toward At what speed is the ambulance...
You are walking along a small country road one foggy morning and come to an intersection....
You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren. As a paramedic, you know that the siren sounds at a frequency of 8.67 kHz. But, as an amateur musician with perfect pitch, you can tell that the frequency you are hearing is actually 7.97 kHz. At what speed is the ambulance traveling?
You are walking along a small country road one foggy morning and come to an intersection....
You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren. As a paramedic, you know that the siren sounds at a frequency of 6.67 kHz. But, as an amateur musician with perfect pitch, you can tell that the frequency you are hearing is actually 6.01 kHz. Is the ambulance moving toward or away from you? AT WHAT SPEED IS THE AMBULANCE TRAVELING? = _______ mph
You are walking along a small country road one foggy morning and come to an intersection....
You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren. As a paramedic, you know that the siren sounds at a frequency of 8.67 kHz. But, as an amateur musician with perfect pitch, you can tell that the frequency you are hearing is actually 9.35 kHz. Is the ambulance moving toward or away from you? toward away At what speed is the ambulance traveling? Number...
please help. thank you lots You are driving down the road at 15.6 m/s (35 mph)...
please help. thank you lots
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 740 Hz. The speed of sound in air is 344 m/s. Part A What is the speed of the ambulance? The positive direction points from your car istener) toward the ambulance (source) Express your...
You are driving at a velocity of 95 MPH (42.5 m/s) when you hear a police...
You are driving at a velocity of 95 MPH (42.5 m/s) when you hear a police siren behind you. From your previous run-ins with the law, you know that at a particular point in the sound, the police sirens on the police cars in your town emit a frequency of 751.255 Hz. You hear the sound at a frequency of 752.551 Hz. How fast the the police car going (in m/s)? (Assume that the speed of sound is 343 m/s.)
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...
2. (19 points) You are driving along a highway when you hear the siren of a police car driving at approaching you from behind, and you perceive the frequency as 1320 Hz. You are relieved that he is in pursuit of a speeding Porsche 911car when he continues past you, but now you perceive the frequency as 1265 Hz. (The speed of sound in the air is 344 m/s.) m/ a) What is the frequency of the siren in the...
You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren. As a paramedic, you know that the siren sounds at a frequency of 7.87 kHz. But, as an amateur musician with perfect pitch, you can tell that the frequency you are hearing is actually 8.51 kHz. Is the ambulance moving toward or away from you? O away O toward At what speed is the ambulance...
You are walking along a small country road one foggy morning and come to an intersection. While you are crossing, you hear an ambulance siren. As a paramedic, you know that the siren sounds at a frequency of 8.67 kHz. But, as an amateur musician with perfect pitch, you can tell that the frequency you are hearing is actually 9.35 kHz. Is the ambulance moving toward or away from you? toward away At what speed is the ambulance traveling? Number...
please help. thank you lots
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 740 Hz. The speed of sound in air is 344 m/s. Part A What is the speed of the ambulance? The positive direction points from your car istener) toward the ambulance (source) Express your...
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