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Tuning forksThe sound is caused by the vibration after it is struck, the density of water is much greater than the density of air, the tuning fork that is struck is put into the water, because of the high density of the water and is greatly hindered, the vibration attenuation of the tuning fork is very fast, and there is no sound after a while.
In addition, when sound waves are transmitted in the water, when they encounter the interface between the water surface and the atmosphere, they will be reflected back into the water, and they cannot penetrate the interface between the water and the atmosphere, so the sound of the tuning fork cannot be heard.
The tuning fork is presented"y"Shaped steel or aluminum alloy sounder, various tuning forks can produce pure tones of different frequencies when vibrating due to their mass and different length and thickness of the wishbones.
Tuning fork examination is important in identifying deafness.
Nature - Transmitted or sensory hearing loss, it is a simple and reliable common diagnostic method. Take it with a tuning fork"Standard tone"It is one of the most important links in the piano tuning process. Its importance lies in the fact that it is related to the pitch position of each key of a piano.
In teaching, a tuning fork can be used to demonstrate resonance. Tap the tuning fork to collect the sound waveform. The test found that the tuning fork was tapped, and the tuning fork amplitude.
Small, the amplitude of the waveform is small, and the sound produced by the tuning fork is also small; Knock the tuning fork hard, the amplitude of the tuning fork is large, and the amplitude of the waveform is large.
At this time, the sound of the tuning fork is also loud. Description: Loudness.
It is related to the amplitude of the tuning fork vibrating. The greater the amplitude, the greater the loudness; The lower the amplitude, the less loudness.
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Of course you can't hear the sound.
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No, it's absorbed by water.
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A tuning fork that has been struck will create water waves when it touches the surface of the water. This is because when the tuning fork is hit, a vibration is generated on the tuning fork, and when the vibrating tuning fork is touched to the water surface, the vibration will transmit waves on the water surface, and water waves are generated.
Why does a tuning fork splash when put in water?
The sound is produced by the vibration of the object, and the tuning fork after striking will produce sound due to vibration, at this time, the tuning fork is placed in the water, and the vibration of the tuning fork will cause the water to vibrate, and the calm water will splash due to the vibration.
What is the tuning fork effect, for some things may not depend on the size of the force, as long as the key to the problem can be truly solved. Of course, small changes can end up having a big impact.
And there is an idiom in China that is more appropriate for this effect, that is, four or two thousand catties. Therefore, when doing things or disseminating things, you can make good use of the key to the things to achieve the best communication effect.
The size of the tuning fork is different, and the sound emitted is different
Striking two tuning forks of the same material and different sizes with the same force indicates that the loudness and timbre of the sound produced are basically the same; The two tuning forks of different sizes cause the vibration speed of the tuning fork to be different, so the different tones of the sound are different; So the answer is: loudness; Timbre; Tone.
The relationship between the length of the air column and the pitch:
The longer the air column, the slower the vibration frequency and the lower the pitch; The shorter the air column, the faster the vibration frequency and the higher the pitch. The air column is a physics term. The column of air does not have a definite shape, it is fluid (like water, it becomes whatever container it puts in).
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What is the phenomenon of resonance? After striking the tuning fork and putting it into the water, an interesting scientific phenomenon happens.
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Yonggang chicken beaten, tuning fork, mood contact, water surface, water surface eggs, built at the beginning of the water splash as the base beaten, tuning fork, kiss contact, water surface only produces a small amount of ripples.
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Striking a tuning fork creates an amplitude. Tuning forks are steel or aluminum alloy sounders in the shape of a "Y" that produce mechanical waves of a single missed wavelength. The mechanical waves emitted by the tuning fork when struck are so weak that they can only be heard clearly when they are brought to the ear.
Therefore, when the tuning fork is struck, it is pressed against a solid plane such as a table, and this plane acts as a resonance plate, which greatly increases the amplitude energy.
Various tuning forks produce pure tones of different wavelengths depending on their size and the length and height of the wishbones.
In physics teaching, tuning forks can be used to demonstrate the properties of mechanical waves. Tap the tuning fork to collect the Huizi spectrogram.
The loudness of the mechanical wave is related to the amplitude of the tuning fork mechanical wave. The greater the amplitude, the louder it is. The lower the amplitude, the less loudness.
Tuning forks are medically used to test a patient's hearing. In industry, a tuning fork level sensor is a level-controlling switch.
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The tuning fork emits sound waves into the waterBy observing the splash around the tuning fork, the tuning fork that is making the sound is vibrating.
The tuning fork is in direct contact with the water, and the splashing of the water is caused by the vibration of the tuning fork, which does not mean that the sound wave has energy, so A is wrong; It is not easy to observe whether the tuning fork that is making a sound vibrates or not, but after putting it in the water, it can stir up a splash, and seeing the splash of water can indicate that the sound fork inserted in the water is vibrating; Therefore b is correct.
The magnitude of the sound refers to the loudness of the sound, the sound of the tuning fork heard by the human ear is getting smaller and smaller, because the loudness of the sound is decreasing, so c is wrong; The purpose of putting the tuning fork in the water is to explain that the sound fork inserted in the water is vibrating, so D is wrong.
Tuning forks
A tuning fork is a commonly used laboratory device in physics, which is a "Y" shaped steel or aluminum alloy sounder, which can produce a single wavelength of mechanical waves. Various tuning forks can produce pure tones of different wavelengths depending on their size and the length and height of the wishbones. The longer the wisharm, i.e., the higher the tuning fork, the longer the wavelength, the more "low" the pitch, and the shorter the wishbone, i.e., the shorter the tuning fork, the shorter the wavelength, the "high" pitch.
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a. The tuning fork is in direct contact with water, and the splash of water is caused by the vibration of the tuning fork, which cannot explain that the sound wave has energy, so A is wrong;
b. Whether the tuning fork that is making a sound vibrates or not, it is not easy to observe, after putting it in the water, it can stir up the splash, and see the splash of the water, it can indicate that the sound fork inserted in the water is vibrating; Therefore b is correct.
c. The size of the sound refers to the loudness of the sound, the sound of the tuning fork heard by the human ear is getting smaller and smaller, because the loudness of the sound is constantly decreasing, so C is wrong;
d. The purpose of putting the tuning fork into the water is to explain that the sounding fork inserted in the water is vibrating, so D is wrong
Therefore, choose B
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If you put a sounding tuning fork in the water and make a splash on the surface of the water, it means that the sounding object is vibrating.
The tuning fork vibrates to make a sound, but it is not good to observe it directly, put the tuning fork that is making a sound in the water, and the water surface stirs up a splash, thus proving that the sounding tuning fork is vibrating, which is to convert the vibration of the tuning fork into the vibration of the water splash, this research method is called the rotation hole change method
So the answer is: vibration; Conversion
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What happens when the tuning fork vibrating socks are high and the royal rush is put into the water?
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When the tuning fork is struck, the tuning fork vibrates to make a sound;
When a ping-pong ball suspended vertically touches a sounding tuning fork, the ping-pong ball will bounce up; Approaching the surface of the water with a tuning fork will cause a splash; The ping-pong ball and the splash of water play a role in amplifying the tiny vibrations in the experiment
So the answer is: vibration; Amplify small vibrations
It is recommended to send it back to DJI for repair. You can make an appointment for repair on the official website.
Best time to put salt: Root vegetables have a tight texture, so you need to put salt early to absorb the flavor. Melons, fruits, and leafy vegetables should be put salt later, because the salt is put early, and the moisture in the raw materials overflows a lot, which not only affects the taste and shape of the dish, but also the dish rots slowly, so it is best to wait for the dish to be ripe before putting salt.
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