4-30

When we walked into class today the entire room was different. The desks and lab tables were pushed against the sides of the room and there was a huge gap in the middle. Our only objective for today was to work on the lab. Once everyone is settled around the room Mr. Manning told us to get out our labs and read over them. Once everyone finished he asked us to do the predictions before we started the lab. After everyone finished their predictions we got the supplies needed for the lab. Each group, which consisted of three to four members, collected a slinky and a stop watch. Two members from each group stretched the slinky long ways across the room. The remaining member or members were the timers and recorded the data. In order to successfully complete the lab we had to time how fast it takes the wave created to reach 20 oscillations. We did this two times for the first to the forth harmonic. Each harmonic got harder and harder to count as we moved up. It was also hard at times to get the right harmonic level. Once we had all the information we had to solve the frequency, wavelength, and speed of each trail. The numbers for each trail of the same harmonic level was about the same. We worked on this lab for the entire period and once we finished we turned it in. At the end of class Mr. Manning reminded us that our 3rd week project for the physics coaster was due.



-Example of the 3rd harmonic