Physics > Lab Report > Report for Experiment #14 Standing waves (All)

Report for Experiment #14 Standing waves

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Introduction The purpose of this experiment is to study standing waves of a string and in an air column. The information collected is used to study the relationship between string tension and wave v ... elocity and to measure sound velocity in Investigation 1 and 2, respectively. In Investigation 1, we found tension and the velocity of the string squared in order to find the actual mass per unit length. For Investigation 2, Investigation 1 Setup & Procedure We are provided with a 120Hz vibrator, two 2’ rods, 3 rod clamps, a pulley, a piece of string, a bucket and weights. First we attach the rods to the opposite corners of a table. On the left rod, we attach two rod clamps one on top of another. The first rod holds the vibrator while the second one holds on side of the string. A part of the string is put under the metal part of the vibrator to generate the waves. The other rod clamp is attached to the other 2’ rod. This is used to clamp the pulley. The other side of the string is tied to a bucket which is hung on the pulley. The experiment starts with 900g in the bucket and decreases each time we want to have more nodes. Nodes are points on the string where it is at rest. We have to find 3, 4, 5, 6, 7 and 8 nodes. Using the mass of the bucket and weights and the length (m) between each node, we found tension (N), wavelength (λ), velocity of string (m/s) and velocity of string squared ((m/s)2). This information is then used to plot the graph Tension vs. Vstring2. The inverse of the slope of the graph gives us the actual mass per unit length (µ). Data & Analysis [Show More]

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