4.14.09



Welcome back from the break everyone!
Today in Physics we started a new unit, unit 10. This unit deals with vibrations and waves but today we started off with the topic of waves. In the beging of the class we collected two pages: page 1 (introduction page) and page number 2-3 called Waves!!! Notes. Looking up at the board to read the daily agenda which stated the following: A reminder that our Roller Coaster part one is due next Friday, Intro to waves (website/ notes), and finally a discussion. We were told that today we were to use the computers to watch an on-line lesson (website: http://www.montereyinstitute.org/courses/College%20Preparatory%20Physics%20I/course%20files/multimedia/lesson16/lessonp.html) and when finished to then fill out the answers on page 2-3. Here we learned that energy can be transferred from one system to another in two ways: by moving matter and by waves. There are three types of waves : matter, mechanical, and electromagnetic that should be known. In addition to we learned the three types of, they are transversive, longitudinal, and surface. Changing the subject of matter to a spring you can change the frequency of it's wave(s) by increasing the weight of the material. When decreasing the frequency of a wave on a spring the wavelength gets bigger from crest to crest and is also traveling at a slower rate. If the frequency increases then the period decreases. Amplitude: The distance from the center line to the crest/ trough. Period: The time it takes for one complete wave to pass a given point (T). Frequency: The number of cycles that pass a given point in a certain amount of time. (F) (measuerd in Hz) Pulse: A bump, a single wave Periodic wave train: A series of pulses.
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