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 Amplitude Modulation This tutorial is part of the National Instruments Measurement Fundamentals series. Each tutorial in this series teaches a specific topic of common measurement applications by explaining the theory and giving practical examples. This tutorial covers an introduction to RF, wireless, and high-frequency signals and systems. A PDF of the tutorial is available for download. http://www.ni.com/white-paper/3002/en/
 Superposition of Waves This java applet illustrates the superposition principle of waves. Users can control the frequency, velocity, amplitude, and phase of the waves. The frequencies of the waves can be different, illustrating beats. The applet includes a short description of the physics and instructions on how to run the simulation. It is also connected to a discussion board for users to provide comments and ask... http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=19.0
 Pendulum Applet This java simulation demonstrates energy conservation with a pendulum. It shows a simple pendulum oscillating back and forth, and it graphs the kinetic and potential energy of the system as it oscillates. The user can change the gravity, the mass at the end of the pendulum, and the maximum amplitude of the pendulum. http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=11.0
 Talking about Sound and Music Catherine Schmidt-Jones, in cooperation with the Connexions Project at Rice University, addresses the connection between musical instruments and the physics of sound in this site. Designed for an audience from middle school students to adults, users will find educational diagrams and explanations about physics terms such as pitch, frequency, and standing waves. This is an excellent resource for... http://cnx.org/contents/6521bb7a-c72e-48af-8df0-9a1a909ff7e0...
 PhET: Wave on a String This website contains a Flash applet which simulates the motion of a vibrating string as well as ideas for activities involving this simulation. The end of the string can be moved using the mouse or driven by an oscillator to set up traveling or standing waves. The string is modeled as a series of interacting masses. The tension of the string, damping, and frequency and amplitude of the... http://phet.colorado.edu/en/simulation/wave-on-a-string
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