Physical Science 20 - May 28

Today we started looking at the wave model and learning about wave behaviour.  We started by learning what causes waves.  Waves are periodic motion caused by vibrations or disturbances in a medium.  We learned about characteristics and key terms including period and frequency and how they are related.  This was covered on slides 97-105.  We didnt quite get to the homework today.  We will do that tomorrow.

Physics 30 - May 28

Today we started looking at collisions in 2D.  These problems just turn out to be momentum conservation problems with vector analysis.  We went through Examples 24 and 25.  Tomorrow we will go through the last example in the unit.

Physical Science 20 - May 27

Today we studied the remainder of the properties of light as well as looked at the particle model for a viable option of explaining these properties.  Students copied down notes on a summary sheet and we came up with the conclusion that the particle model doesn't adequately explain the properties of light.  This was all covered on slides 83-96.  Tomorrow we will start looking at the wave model after we get an understanding of what waves are.  This will happen however after your quiz.  Reminder of your quiz tomorrow on refraction.

Physics 30 - May 27

Today in class we continued looking at collisions and how to solve them in one dimension.  This involved mostly using the law of conservation of momentum and determining what type of collision we were working with.  We then worked through 3 different examplkes to get the technique down.  This was all covered on slide 53-58.  Assignment 4.7 was given at the end of the class as well.  Please have a look at that before tomorrow.  Tomorrow, we will begin to look at collisions in 2D.

Physics 30 - May 26

Today in class we moved on despite the fact that the school celebrated the Box Lunch Auction today.  We began to look at the conservation of momentum and how we can apply that to different situations.  We went over a couple of examples related to explosions and how to solve them with the conservation of momentum and then we also learned about the different types of collisions.  This was covered on slides 49-53.  We will looking at collisions tomorrow with an examination of collisions in one dimension.

Physical Science 20 - May 25

In Period 2, I checked Homework 3.5 and then we learned how to draw ray diagrams for lenses.  Students worked on Assignment 3.2 and I will be taking this in on Wednesday as tomorrow is the box lunch auction.

In Period 4 today, we started looking at the rest of the properties of light with some demonstrations and then we started to match those properties to a scientific model.  This model assumes light is made up of particles and we call this model the particle model of light.  Students took notes on slides 83-94.  

Physics 30 - May 22

Today we started to look at momentum, what it is and how we measure it.  We also learned about the impulse momentum theorem.  This means that in order to change an object's momentum, one needs to apply a force to an object for an amount of time.  The product of the force and the time is called the impulse.  We went through examples 16, 17, & 18 and I assigned Assignment 4.6 at the end of the class.  

Reminder that on Monday we will be having our first in class assignment for this unit on energy and work.  Know how to do Assignments 4.1-4.5.  Have a great weekend everyone.