Tim+and+Chi+Min

Hypothesis: We think that when the density of the water is higher the frequency will get lower. We think so because when sound goes through a heavy gas the pitch is lower when it goes through a lighter gas the pitch is higher. Procedure: 1.open audecity 2. get wine glasses 3. fill wine glasses with water 4.rub the wine glass to create a sound wave 5.start recording in audacity 6. add different densities of water 7. repeat steps 3-6 5 times. 8. record the changes in the sound waves compare them Materials: 1.Wine glass 2.Water 3.Something to rub the wine glass with

Results: 
 * Amount of Water in Glass || Frequency of Wave in Hz ||
 * 0 mL || 769.23 ||
 * 10 mL || 769.23 ||
 * 40 mL || 769.23 ||
 * 100 mL || 769.23 ||
 * 200mL || 529.33 ||
 * 300 mL || 476.19 ||

Analysis: The data shows that when the wine is unfilled with any liquids, the frequency produced when vibrated by circling a finger on the top rim of the wine glass is 769.23 Hz. At 10mL of water, the data shows no change in frequency when the wine glass is vibrated. This is also true with 40mL and 100 mL of water. This is perhaps unchanged because the amount of water is not significant enough to change the frequency. However when 200mL of water was added, the frequency dropped to around 529 Hz. At 300mL, the frequency was 479.19 Hz showing a significant drop in frequency.

Approximant Musical Note V.S. Frequency (Hz): 769.23 Hz = F#1/Gb1 529.33 Hz = C2 479.19 Hz = D2 **Conclusion:** In conclusion, it is true that the more water is added to the wine glass, the lower the frequency is. The lower the frequency, the higher the pitch of the sound/musical note is. To help the measuring process more accurate, we could've used a microphone that focuses on the sound source and use a different container to measure the frequency and water level. Because the wine glass's volume is small, the amount of changes in water level sometimes does not effect the frequency in which the sound is produced. 