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Why is there a ball inside a whistle?
The reason for a ball inside a whistle is that it produces a 'warbling' sound that makes the whistle's sound more attention getting
How does a whistle make sounds?
Air travels through the whistle rubbing against the sides of the whistle than being forced out of the smaller opening at the front. The friction of air against the sides of the whistle is what makes the noise.
A Doppler effect occurs when a source of sound moves?
The "change in sound" refers to a change in frequency. If (for example) you move compared to the sound source, then more, or less, wave crests may pass you every second, depending in which direction you move. It's best to check an article on the Doppler effect (for example, in the Wikipedia); with an illustration or animation, it is actually quite intuitive why this happens.
Two friends blow two whistles at the same time The first whistle makes a sound whose frequency is twice that of the sound made by the other whistle Which sound will reach you first?
the higher one
What is the sound of whistle called?
yes, a whistle sound is high pitched sound
What happens to the sound of a train whistle as the train approaches and then passes?
This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.Read more: http://wiki.answers.com/Why_is_the_pitch_of_a_train's_whistle_higher_as_the_train_approaches_and_loweras_it_moves_away#ixzz1DToTuS3j
When does an observer at the crossing hear the lowest frequency of the trains whistle?
The observer at the crossing hears the lowest frequency of the train’s whistle when the train is moving away from them. This is due to the Doppler effect, where the pitch of the sound decreases as the source moves away from the observer.
What type of scientis twould use a Doppler radar and why?
The Doppler radar used in weather forecasting measures the direction and speed, or velocity, of objects such as drops of precipitation. This is called the Doppler Effect and is used to determine whether movement in the atmosphere is horizontally toward or away from the radar, which aides in weather forecasting. The radar was named for J. Christian Doppler, an Austrian physicist, who was the first to articulate the reason an approaching train's whistle will sound higher than the whistle as the train moves away.
Does the Doppler Effect explain why you hear a train whistle differently after it passes you than you do as it approaches you?
Yes, the Doppler Effect explains this phenomenon. As the train approaches, sound waves are compressed, leading to a higher frequency and a higher pitch. As the train passes, sound waves are stretched, resulting in a lower frequency and a lower pitch, which is why the whistle sounds different before and after the train passes.
What do you call an effect where in the pitch of the whistle rises as the train approaches the station and falls off as it moves away?
This effect is called the Doppler effect. It occurs when there is relative motion between the source of a sound (like a train whistle) and an observer. As the train approaches, the sound waves are compressed, resulting in a higher pitch, and as it moves away, the sound waves are stretched, causing a lower pitch.
Why is the pitch of a train's whistle higher as the train approaches and loweras it moves away?
This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.
What happens to the sound of a train whistle as a train approaches and passes you?
This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.
What happens to sound of a train whistle as a train approaches and passes you?
This is known as the Doppler effect. As the train approaches you, the wavelength of the sound waves it emits are compressed, and therefore the whistle sounds higher. When the train is moving away, the wavelengths are extended, causing the whistle to sound lower. If the train were not moving at all, the pitch you would hear from the whistle would be somewhere between the high and low pitches you hear when the train is moving.
What happens to the sound of a train whistle as a train approaches and passes you why?
The raising and lowering of the whistle's pitch due to the alteration in the relative speed of the whistle as it goes by you, described by two terms that can be discovered by reading your homework assignment.
How does Sheldon explain the Doppler effect in "The Big Bang Theory"?
In "The Big Bang Theory," Sheldon explains the Doppler effect by using the example of a train whistle changing pitch as it approaches and then passes by. This change in pitch is due to the compression and expansion of sound waves as the train moves relative to the observer.
What is the Doppler effect and is it useful?
It is the effect that happens when waves like sound are moving in relation to another object. In the classic train whistle example, The whistle suddenly drops in pitch as it passes you and starts to move away from you. This is because the sound waves now are stretched out, giving them a lower pitch. It is useful. Doppler radar used in weather forecasting is one example.
Would you hear a change in pitch if you are moving on a train and the whistle blows?
Yes, you would hear a change in pitch as you move towards or away from the source of the sound. This is due to the Doppler effect, where the frequency of the sound waves changes as the distance between the source and the observer changes.
