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Practice Questions and Problem (Exam 2) Problem 1: The vibrating part of the string shown below has a length of 120 cm and mass of object that hangs has a mass of 2.0 kg 5.0 grams. The Draw five snapshot graphs corresponding to the first five standing wave modes that can be supported on this string. On each diagram Clearly label the wave length of that mode Clearly label the node and antinodes. Determine a value for the wavelength of each mode 2. What is the wavespeed of waves that travel on this string? 3. What frequencies will each of the first five normal modes? Draw a frequency spectrum graph that depicts each possible frequency and its relative amplitude (intensity). 4. Imagine that the string above is vibrating at its 4 harmonic (3d over tone). Without changing the frequency of the vibration (or anything about the string), what would happen if the mass hanging off the end were doubled? A. A new standing wave pattern would occur with a longer wavelength B. A new standing wave patterm would occu C. No standing wave pattern would occur. Explain.

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211-2a 3 2 Sam /2o cm 跗 2.4 2 0-48

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