Velocity of Sound

2249 WordsJul 8, 20129 Pages
Experiment 7: Velocity of Sound Jaybee J. Balilea, Sharmaine O. Baysic, Maria Anjelette Patricia C. Belen, Dianne Grace D. Bolloso Department of Biological Sciences College of Science, University of Santo Tomas Espana, Manila Abstract Sound is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard. It is produced when something vibrates causing its the medium (water, air, etc.) around it to vibrate as well. In common everyday speech, speed of sound refers to the speed of sound waves in air. Sound travels faster in liquids and non-porous solids than it does in air. In this experiment,…show more content…
The wavelength of the sound produced was computed. 2 more trials were made and the average wavelength was computed. By using the average wavelength and the frequency engraved in the tuning fork, the velocity of sound in air inside the glass tube was compted. The temperature was then determined and the speed of sound was then computed. Activity 2: The vernier microphone was connected to channel 1 of the interface. The microphone was positioned near the open end of the close tube. The file “24 speed of sound” in physics with computer file was opened. The data collection begins after the snapping the fingers or clap your hands near the tube. The time interval between the start of the first vibration and the start of the echo vibration was determined using the graph. The speed of sound was then computed by dividing the length of the tube by ½ of the time interval obtains in step 5. The % error was then computed. Activity 3: A thin layer of cork dust as uniformly as possible inside the kundt’s tube was placed. The rod was then clamped at its center. The rod was rubbed with a piece of cloth with coarse poweder. This will set the rod into vibration producing a sound of high frequency. A standing wave pattern will be formed in the cork dust inside the glass tube. The distances between two consecutive displacement nodes were measured. The average distance was computed. The frequency of sound produced was determined. Using the computed frequency,

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