Physics IA - IA Lab Report Physics February 2016 Title The...

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IA Lab Report - PhysicsFebruary 2016Title: The Variation of Frequency from the Singing Wine GlassPersonal Engagement:When I was around 9 or 10 years old, I have seen a man playing a song -which I cannot recallnow- with wine glasses that contain different levels of water on a Korean TV show. The soundproduced from the wine glasses were so clear and phonogenic, I was extremely amazed and Ihave asked my father how they do that. I remember that my father told me that there was sciencebehind it, it’s hard for me to understand in my current age, then the person who was playing thesong later explained that the note of the sound changes depends on how much water is in thewine glass. At that time it was just a short interest, but even as I got older and I constantly got tosee the videos of people playing music with wine glasses, I always thought that those were reallycool and amazing, then I wanted to know how the wine glasses actually make the sounds likethat. But I never got to look up for it or actually have a research on it, so when I saw the singingwine glass on the physics IA topic list, I was really excited and decided to have it as my topicright away. Also knowing that the singing wine glass would be my topic made me to be reallypay attention in physics class when we learned about resonance, waves and frequencies.First I thought the variation of the frequency produced by the wine glass depends on the amountwater is related to the open-closed tube resonance, which means that the frequency changes bythe length from the water surface (considered as node) to the opening. But as I did more researchon the topic and as I went through my actual experiment, I realized that the mass of water inwine glass affects the frequency as well, pretend the volume and thickness of the wine glass . Idesigned my experiment to find the change in frequency depends on the amount of water, usingwine glass, and change the water volume for different trials by measuring the amount of waterwith the beaker.Exploration: Research Question: How does the amount of water affect the frequency of the sound provided bythe wine glass? Do they have a direct relationship, which as the amount of water increases thefrequency of the sound increases? Or do they have an indirect relationship, which as the amountof water increases the frequency of the sound decreases.I am looking to figure out the relationship between the amount of water in the wine glass and thefrequency of the sound produced by the singing wine glass. The basic purpose of this experimentis to find out the trend between the amount of water and the frequency. To start the experiment, Ishould first figure out what type of resonance the wine glass makes, and the most reasonableresonance seemed to be the open-closed tube resonance. Since the wine glass is open at one side
and closed at the other side (closed side being the water surface), With the principle of the open-

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