5-5

On Tuesday May 5th, 2009, Mr. Manning began class by assigning a daily question. The question was as follows; A standing wave is produced in a tube 3 meters long. The tube has 2 open ends. 1.) Draw the standing wave in the 3 meter long tube if the 1st harmonic is sounded. 2.) How long is 1 wavelength? **6 meters**

We then went over the daily question and Mr. manning explained the answers and how to find them. They are listed above. Mr. Manning then put on a video about the negative effects of resonance. It showed the tragedy of the Tacoma Narrows Bridge in Tacoma, Washington. The bridge received a gust of wind that was just the right frequency that it caused the bridge to oscillate up and down and eventually collapsed. We then moved on to the **Beats and Doppler Effect** worksheet, it involved going to an accompanying website that showed how beats and Doppler radar work. We had to answer the question in groups or by yourself. "Here ends the lesson." - //The Untouchables//