What are standing waves and how do they form? The applet below is a great tool for understanding how standing waves are formed when periodic waves reflect back and interfere (constructively and destructively) with themselves; the result is a standing wave.
Today we will be learning about the Doppler Effect. Watch the video tutorials below and complete the notes part of the package as well as the example problems. In class we will do a quick recap of the lesson, talk about applications of this (doppler radar, the big bang, police radar, etc.) and work on the problems.
Today we will be working on some review for the exam as well as completing any other assigned work.
Today you will do a short research assignment on the speed of sound. You can use a cellphone, computer, or the textbook to find the answers. You will learn about sound in space (is there any?), the speed of sound in air and how it depends on temperature, the mach number, sound barrier, sonic booms, etc. Watch the videos below as well...
[we are doing this lesson a bit out of order because I am away - we will pick back up tomorrow with periodic waves and then move into sound next week and pick back up from here]
Watch planes breaking the sound barrier - listen for the loud "boom" and "why is there a vapour build up around the plane?"
Today we are doing an investigation about the efficiency of a hotplate and finishing our work, energy and power review. Test will be on Wednesday.