wavelength will be twice the length of one segment. Record in the data table the added mass in kilograms. Then record the total mass (added mass plus the mass hanger) in the data table. Record the resulting tension T = mg in newtons. 6. Repeat the procedure for 4, 3 and 2 segments by adding more mass to the pulley. () 7. Compare the experimental velocity (v = f) with the theoretical velocity by computing the percent difference. Fig. 1: Standing on Strings Apparatus Experiment 15: THE SPEED OF SOUND IN AIR PURPOSE: The speed of sound in air will be determined by means of an adjustable air column resonance tube, driven by a known frequency. INTRODUCTION: When a tuning fork is set into vibration over the open end of a tube which is closed at the other end, a series of compressions and rarefactions occur within the length of the tube. If the length of the tube is such that an odd number of quarter wavelengths just fit into the tube, a condition known as resonance occurs and the sound heard emanating from the tube is greatly enhanced. When resonance occurs, the gas particles just outside the mouth of the open tube are oscillating up and down with their maximum amplitude. This location is called the displacement antinode, and is symbolized in Figure 1 by curved lines showing a maximum displacement from the center of the column (although the actual displacement is vertical, not horizontal). There must be a displacement node at the bottom of the air column, as the water prevents the gas particles from oscillating up and down. Since resonance occurs at odd multiples of quarter wavelengths, one is able to determine the wavelength, by noting the length of the tube at which resonance occurs. , Thus: Fig. 1. From the above equations, the wavelength () can be calculated as: = (L3 - L1) (Eq. 1) 
wavelength will be twice the length of one segment. Record in the data table the added mass in kilograms. Then record the total mass (added mass plus the mass hanger) in the data table. Record the resulting tension T = mg in newtons. 6. Repeat the procedure for 4, 3 and 2 segments by adding more mass to the pulley. 7. Compare the experimental velocity (v = f) with the theoretical velocity () by computing the percent difference. Fig. 1: Standing on Strings Apparatus Experiment 15: THE SPEED OF SOUND IN AIR PURPOSE: The speed of sound in air will be determined by means of an adjustable air column resonance tube, driven by a known frequency. INTRODUCTION: When a tuning fork is set into vibration over the open end of a tube which is closed at the other end, a series of compressions and rarefactions occur within the length of the tube. If the length of the tube is such that an odd number of quarter wavelengths just fit into the tube, a condition known as resonance occurs and the sound heard emanating from the tube is greatly enhanced. When resonance occurs, the gas particles just outside the mouth of the open tube are oscillating up and down with their maximum amplitude. This location is called the displacement antinode, and is symbolized in Figure 1 by curved lines showing a maximum displacement from the center of the column (although the actual displacement is vertical, not horizontal). There must be a displacement node at the bottom of the air column, as the water prevents the gas particles from oscillating up and down. Since resonance occurs at odd multiples of quarter wavelengths, one is able to determine the wavelength, , by noting the length of the tube at which resonance occurs. Thus: Fig. 1. From the above equations, the wavelength () can be calculated as:  = (L3 - L1) (Eq. 1)
P06%20Lab%20Book.docx