Lesson is started using a problem which involves determining the wavelength, velocity, period and frequency of a wave when a set of parameters are given. Finding the new wavelength when the frequency is changed led to a review and explanation of the Doppler Effect. Constructive and
destructive interference was discussed and examples drawn along with the resultant wave formed.

A discussion of material previously covered, indicated that he was just about at the place I was at in my other physics class. In questioning him about the material, it became obvious that he had a few ideas that needed correction. We went into the lab and performed a series of quickly put together demonstrations which corrected one of these misconceptions, regarding the period of a pendulum. Returning to the classroom, and using
printouts of a sine wave, the major parts of the wave were written on the printout. These included the crests, the wavelength, the amplitude, the frequency and the period.

I worked with Marcel to do problems involving the formulas for kinetic energy and gravitational and elastic potential energy. We worked with gravitational potential energy reference frames and I explained how the selection of a reference can change the answer to how much potential energy is contained by an object. There was no assignment.

Marcel and I finished adjusting mass and string length of the pendulum in our lab. After analyzing the data, Marcel realized that the period change was greatest when the string length changed. I showed him the formula for the period and he recognized that mass was not even in the formula but length was. We agreed to finish the report next time. There was no assignment.

A short quiz which dealt with the material covered on liquid pressure, bouyancy, and apparent weight in a liquid was followed by a review of transverse and longitudinal waves as demonstrated by video. The Doppler affect was explained in terms of frequency of waves becoming shorter as a moving object(like a siren on a police car) both approached and past a subject.

Marcel and I continued studying pendulums with different masses and string lengths. Each change in either mass or string length was done with 3 trials. We didn't finish all the trials so we will continue tomorrow. There was no assignment.

Using diagrams and demonstrations, a transverse wave was described in terms of direction of energy motion and particle medium motion. The particles move perpendicular to the motion of the wave. The definition and examples of longitudinal waves were shown using diagrams and demonstrations, showing that with this type of wave the particles move parallel to the direction of the wave. Examples of this wave are sound waves. Both constructive and destructive interference was presented as waves in phase and out of phase meet at a point. The resultant wave was drawn in both cases.

A demo using a sheet of paper being moved at a constant rate under a marking pen which was vibrating up and down was used to produce a sine wave. The main parts of the wave were listed and defined on a lettered diagram. These included the crest, trough, wavelength, frequency, and amplitude. The velocity of a wave was determined when the frequency of the wave was determined and the wavelength given. The formula was derived as Velocity = frequency x wavelength, or V = F x Lambda. A few problems were presented for solving the velocity, frequency and wavelength

I worked with Marcel to set up a lab to use a mass hanging on a thread at a specified distance from a pivot point. We then measured the time required for 1 period, the time it takes for the pendulum to swing forward and back once. We tried several methods of getting accurate times and obtained a measurement of time for a given distance and mass. The lab was not completed so we will continue it tomorrow. There was no assignment.

I worked with Marcel on review problems covering work, gravitational potential and kinetic energy, and elastic potential energy. Marcel was able to solve most of the problems but made a few errors with mixed-unit problems. We also did a problem calculating the coefficient of friction. There was no assignment.