5-6-09

Michael Poland 5/6/09 **__Test Tommorrow__** After telling several people to find a seat Mr. Manning began his fifth period physics lesson. We warmed up our minds by getting out page twenty three number four and proceeded to go over it. The question asked, give an example of a resonating object. The student generated responses were, a piano, guitar, and nasal cavities. A demonstration was shown. Two tuning forks in middle c were vibrated and the reaction was a wavering change in volume. The reason for this is because the forks were tuned sightly differently. It was concluded that what we were hearing was beats which can be used to figure out the frequency. The next topic of discussion was the doppler effect. We watched Donnells videos on Youtube. The videos were of trains and we listened for the doppler effect. The next video was of a jet going supersonic a large tail of condensed water molecules following him. A physical demo was shown by placing an alarm in a ball and then rotating it in a 360 degree circle. The effect was a change in the noise being produced. Mr. Manning shared with us an interesting person who can visualize things just by making a small noise.