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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.
What else can I help you with?
How can I make a wine glass sing?
To make a wine glass sing, wet your finger and gently rub it around the rim of the glass. This creates friction and causes the glass to vibrate, producing a singing sound. Adjust the pressure and speed of your finger to change the pitch of the sound.
What causes water to vibrate when you rub your finger on the rim of a glass?
The friction between your finger and the glass creates vibrations in the glass, which in turn transfers energy to the water inside. This energy causes the water molecules to move and create ripples on the surface of the water, resulting in the vibrating effect.
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 rocks in terms of wine or drinks?
Generally salt or sugar, around the rim of the glass.
What is Edge of a glass or cup called?
The top edge of a glass or cup is called the rim.
How do you make sugar and food colouring stick to rim of glass?
Put some lemon juice on the rim of the glass.
What makes a wine glass sing?
A wine glass makes a noise when you run your finger along the rim because of vibration. Your finger rubs against the glass and sets up vibrations because of friction. The glass crystals are "frozen" into a solid and are lined up all in one direction inside the glass. When the rim vibrates, the ripples spread all over the glass, and the bell-shape of the glass focuses the sound back out the top. Voila - sound.
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 create a sugar rim on a cocktail glass?
To create a sugar rim on a cocktail glass, first dip the rim of the glass in a shallow dish of water or citrus juice. Then, dip the wet rim into a separate dish of sugar, rotating the glass to coat the rim evenly. Shake off any excess sugar and let it dry before pouring in the cocktail.
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.)
How can I get sugar to stick to the rim of a glass effectively?
To get sugar to stick to the rim of a glass effectively, you can first moisten the rim with a lime or lemon wedge. Then, dip the moistened rim into a plate of sugar, gently pressing down to ensure it sticks.
