Physical Science A

Bellwork:
    1.  What is simple harmonic motion?
   
    2.  What will happen to the speed of a light wave as it passes from a gas into a liquid?

    3.  IF a wave has a frequency of 35 Hz and a wavelength of 4 meters, what is the speed of the wave?      What is the period?

    4.  A wave traveling at 120 m/s has a wavelength of .5 meters, what is the frequency of the wave?  The     period?


Check and go over the homework.

Quiz over wave speed problems.

Continue the discussion on wave interactions. 

HW: Wave interaction concept review page.

Physics

Bellwork:
    1.  If a plane were to explode while in flight, will the momentum of the plane still be conserved?

    2.  Why is it that the balls on the Newton's Cradle do not continue moving forever?

    3.  Why won't a ball bounce back up to the same height that it is dropped?

Collect initial plans for the egg drop.

Hand out and discuss the prelab

Lab: Conservation of Momentum.  The goal of the lab today is to look at collision between the the dynamics carts and establish whether momentum is conserved or not.  You will set up six different collision that you will make qualitative observations about the collisions.  Once finished, you will then use the photogates to make quantitative observations of two collisions.  When finished you will determine if momentum was truly conserved based on your observations and data.

We have only four tracks that can be used to collect data, so we will have to share.  Take turns using the tracks. Set the carts on the track, produce the collision, and make your observations, collect the data, and let the next group go.  As a group records their observation, another can set-up and produce their collisions.

BIG IDEA...BE PATIENT!