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What is happening when you rub your finger around a glass rim?
Wiki User
∙ 13y ago
Running a finger around the rim of a glass will "stimulate" the glass. We are adding energy to the glass, and because the finger tends to "slip and grab" as it moves around the rim, the energy is delivered in "pulses" to the glass. This tends to make the glass vibrate, and we are adding to the vibrational energy by continuously running our finger around the rim of the glass. The net result is that the glass will "sing" to us in a given pitch.
Some glasses lend themselves better to this experiment than others, and most stemware works quite well, even "cheaper" types. When doing an experiment, moistening the finger will help things. This is a good project to investigate some things in basic physics, though the principles at work may be a bit less than clear. The glass, like other objects, has a natural resonance, and we "tap into" that by mechanically stimulating the glass at the rim with our finger. When we find the glass beginning to vibrate, we can move our finger a bit faster or slower to add energy "in sync" with the vibrations, thus sustaining and increasing them.
Wiki User
∙ 13y ago
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What causes water to vibrate when you rub your finger on the rim of a glass?
friction between the water and glass
What makes a wine glass sing?
When a wine glass "sings" or produces a sound, it is typically due to the glass vibrating at a specific frequency when tapped lightly. The size, shape, and thickness of the glass all play a role in creating this resonant frequency that produces the singing sound.
What is rocks in terms of wine or drinks?
Generally salt or sugar, around the rim of the glass.
Can you use the word rim in a sentences?
The basketball player made a spectacular dunk, hitting the rim with force.
How do you make sugar and food colouring stick to rim of glass?
Put some lemon juice on the rim of the glass.
How Do Glass Break By Singing?
Glass doesn't crack on a high note, every rounded piece of glass has it's own high frequency and when played back to itself makes the glass shatter. You can get the sound by getting a pint glass and wetting your finger, pushing down and making a smooth fast motion around the rim.
Why does a glass filled with water shatter when you run your finger along the rim of the glass?
A piece of crystal stemware has a natural or resonant frequency that can be excited by rubbing a moistened finger along its rim. Filling the glass with water merely changes the pitch of the tone. The tone you hear is created when the crystal vibrates at frequencies in the audible range for humans. Although it's difficult to see, the glass actually flexes during the vibrations. If the glass deforms sufficiently, it can break, since crystal is brittle and not very elastic. It is not likely that a flawless glass could be made to break merely by rubbing its rim. The MythBusters demonstrated the resonance of a crystal glass and shattered several by exciting the glasses with a human voice. One professional singer broke a glass without the use of amplification. See the video.
What is a scissor-cut rim on a glass bowl?
A scissor cut rim on glass is just that ... a rim cut with scissors, or more correctly shears, when the glass is hot and molten. It also means that it's hand made.
How do you throw a frisbee better?
backhand- hold the disc with your index finger on the rim and the rest under it. keep the disc straight and snap your wrist while putting your arm into it. forehand- put your middle finger on the rim with your index next to it and the ring and pinkie finger on the inside rim. Snap your wrist.
What do you do if you get your finger stuck in a glass bottle?
You can try using soap and water on the rim of the bottle where your finger is stuck. Pull gently (don't jerk the bottle). Another thing you can try is waiting a few minutes. You finger will release moisture and you should be able to remove your finger more easily. (I did this and it worked. My finger was stuck pretty good, too.) If you absolutely can not remove the bottle from your finger, you should go to the Emergency Room. Do NOT try to break the bottle. You might get glass in your finger (or face, or other part of your body.)
Objects that vibrate causing sounds?
This question isn't very specific but if you are asking what kind of objects that can cause sound then try a tuning fork or if you don't have that then use a wet glass partially full and wet your finger and slide it around the rim (it has to be fine crystal).
What is another word for edge of glass?
rim
