Consider the Doppler effect in the following situation. You are stationary and there is no wind...
Consider the Doppler effect in the following situation. You are stationary and there is no wind so the air is also stationary. A source of sound starts moving towards you. The ________ of the sound wave appears to become higher.
Homework Answers
the frequency of sound wave appears to become higher.
hence answer is frequency.
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Consider the Doppler effect in the following situation. You are stationary and there is no wind...
Derive the Doppler effect equations of a moving source and a stationary listener for the following...
Derive the Doppler effect equations of a moving source and a stationary listener for the following two scenarios: Source moving away from the listener and Source moving towards the listener. Thereafter, use your derived result to calculate the Frequency that would enter the listener's ear for the combined scenarios, if the speed of sound is 321m/s, the speed of source is 46.8 m/s and the source frequency of 188 Hz. Answer:
When the source of a wave and an observer move either towards or away from each...
When the source of a wave and an observer move either towards or away from each other the observed frequency of the wave will be different from the frequency at which the wave is emitted. For example, if you are standing by the side of the road and a police car with a siren passes by, the frequency of the sound you hear will be higher when the car is moving towards you and lower when it is moving away...
(c) With reference to the Doppler Effect, write down an expression that relates the sound frequency...
(c) With reference to the Doppler Effect, write down an expression that relates the sound frequency fo heard by a stationary observer, when a sound source moving towards the observer at speed vs emits a frequency f. Based on the expression, state whether fs or fo is larger, and outline why this is the case. [4 marks]
Hints: Doppler Effect: 5. Another Brick in the Wall 1604 You are in a car that...
Hints:
Doppler Effect:
5. Another Brick in the Wall 1604 You are in a car that is heading towards a brick wall at a speed of 32 m/s (72 mph). You know that the wall has a resonant frequency of 605 Hz, and that if a continuous sound wave at this frequency hits the wall, it will fall down. IMAGES NOTES DISCUSS UNITS STATS HELP PREFERENCES Answer Save Status # tries: 1 Show Details Format Check 7.62 pts. 99% 1%...
The Doppler effect describes a change in frequency or wavelength, caused by motion of the source,...
The Doppler effect describes a change in frequency or wavelength, caused by motion of the source, that is A. only applicable to transverse waves. B. only applicable to sound waves. C. applicable to both sound and light (EM) waves. D. only applicable when the wave is traveling through a medium such as air or water.
Search for an adequate source (book, internet, other student) and (shortly) explain the non-relativistic Doppler effect...
Search for an adequate source (book, internet, other student) and (shortly) explain the non-relativistic Doppler effect e.g. for sound waves [the Doppler-effect for sound waves corresponds to the everyday experience that the frequency of an approaching ambulance with a siren is higher than the one of a car at rest and lower for an ambulance which is removing]. State the sources which you were using.
Doppler Effect You are waiting at a train station when an approaching express train sounds its...
Doppler Effect You are waiting at a train station when an approaching express train sounds its 400 Hz horn, warning everyone to stand back from the platform as it passes. If you perceive the frequency of the horn to be 425 Hz as the train approaches, how fast must the train be moving towards you? You may assume the speed of sound is 343 m/s.
Question 8 Consider a source emitting sound at frequency f. The speed of sound wave in...
Question 8 Consider a source emitting sound at frequency f. The speed of sound wave in the medium is v. (a) Show that the Doppler frequency is for a stationary observer as the source approaches at speed v 12 marks (b) Show that the Doppler frequency is f for a stationary observer as the source recedes at speed v, [2 marks (c) Show that the Doppler frequency is vv as the observer and the source are travelling towards each other...
7. You are standing still on a day when there is no wind. Four different sources...
7. You are standing still on a day when there is no wind. Four different sources of sound are moving relative to you (either directly toward you or directly away from you). State whether each source is moving toward you or away from you and state how rapidly (in m/s) it is moving relative to you. The speed of sound in air is 343 m/s. Explain your answers. (a) Source 1 emits sound of frequency 125 Hz, but the sound...
Question: To demonstrate the Doppler effect, your lecturer puts a tone generator playing a 564 Hz...
Question: To demonstrate the Doppler effect, your lecturer puts a tone generator playing a 564 Hz tone in a ball tied to a rope and swings it around. As it swings, you hear a maximum frequency of 578 Hz from your seat in the middle of the large lecture hall. Assume the speed of sound through the air is 336 m/s. Part 1) What speed is the ball moving at? v = 8.14 m/s Your last answer was interpreted as...
Derive the Doppler effect equations of a moving source and a stationary listener for the following two scenarios: Source moving away from the listener and Source moving towards the listener. Thereafter, use your derived result to calculate the Frequency that would enter the listener's ear for the combined scenarios, if the speed of sound is 321m/s, the speed of source is 46.8 m/s and the source frequency of 188 Hz. Answer:
When the source of a wave and an observer move either towards or away from each other the observed frequency of the wave will be different from the frequency at which the wave is emitted. For example, if you are standing by the side of the road and a police car with a siren passes by, the frequency of the sound you hear will be higher when the car is moving towards you and lower when it is moving away...
(c) With reference to the Doppler Effect, write down an expression that relates the sound frequency fo heard by a stationary observer, when a sound source moving towards the observer at speed vs emits a frequency f. Based on the expression, state whether fs or fo is larger, and outline why this is the case. [4 marks]
Hints:
Doppler Effect:
5. Another Brick in the Wall 1604 You are in a car that is heading towards a brick wall at a speed of 32 m/s (72 mph). You know that the wall has a resonant frequency of 605 Hz, and that if a continuous sound wave at this frequency hits the wall, it will fall down. IMAGES NOTES DISCUSS UNITS STATS HELP PREFERENCES Answer Save Status # tries: 1 Show Details Format Check 7.62 pts. 99% 1%...
Question 8 Consider a source emitting sound at frequency f. The speed of sound wave in the medium is v. (a) Show that the Doppler frequency is for a stationary observer as the source approaches at speed v 12 marks (b) Show that the Doppler frequency is f for a stationary observer as the source recedes at speed v, [2 marks (c) Show that the Doppler frequency is vv as the observer and the source are travelling towards each other...
7. You are standing still on a day when there is no wind. Four different sources of sound are moving relative to you (either directly toward you or directly away from you). State whether each source is moving toward you or away from you and state how rapidly (in m/s) it is moving relative to you. The speed of sound in air is 343 m/s. Explain your answers. (a) Source 1 emits sound of frequency 125 Hz, but the sound...
Question: To demonstrate the Doppler effect, your lecturer puts a tone generator playing a 564 Hz tone in a ball tied to a rope and swings it around. As it swings, you hear a maximum frequency of 578 Hz from your seat in the middle of the large lecture hall. Assume the speed of sound through the air is 336 m/s. Part 1) What speed is the ball moving at? v = 8.14 m/s Your last answer was interpreted as...
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