PhyLab1 - number of nodes. We based this on the fact that...

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PHY 112 Standing Waves on a String This experiment was conducted to gather data to determine a model to predict the actions of standing waves. This experiment was conducted by tying a sting to a pole and to a hanging weight to create a tension force. The string was then placed on an oscillator that was on a rolling tract (to allow the oscillator to move, thus changing the length of the string. Our group tested the affect of the mass-density of the string against the number of nodes that would appear. We held the frequency, length of string, and tension force constant at 57Hz, 1.7m, and 4.41N respectively. We then tested four different mass-densities along with these constants. We predicted that as the mass-density increased, so would the
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Unformatted text preview: number of nodes. We based this on the fact that as the mass-density increased, the waves would interfere with their reflections in more places then the lighter strings. We determined from our data that the number of nodes was directly proportional to the square root (sqrt) of the mass-density. From the data retrieved from the class we concluded that the general model for this experiment was: Nodes= 1.96*Frequency (Hz)*Length (m)*sqrt (unit density (kg/m)/Tension (N)) This compared very well to what was expected from the previously developed theory. The only difference was in the constant that we obtained (1.96) was a little lower then what the theory described....
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This lab report was uploaded on 04/18/2008 for the course PHY 111 taught by Professor Morgan during the Fall '04 term at University of Maine Orono .

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