21 September 2011

Today we discussed distance and displacement. We also conducted a Battery Car lab were we measured the position of the battery car and graphed it on a Position Vs. Time graph. We ended the class showing how the faster the object the steeper the slope of it Position Vs. Time graph.

The homework was to finish the lab worksheet and turn it in on Monday.

Notes:

Monday, 19 September 2011

There was a sub today. You did a team teaching task over pages 10-14, 20-23, and 40-47 in your physics textbook. 

Your Homework:  

• Pg. 47 #1, 3
• Pg. 69 #2, 4, 5ab

Vector Worksheet Answers

 Here is the key to the Vector Homework. As I completed this I realized that some of it was going to be difficult for you. If you stick with the vector addition principal on most of them you willbe correct.

Extra Credit 1

Watch the Mythbuster video below and post your thoughts on this topic. I will give you until class on Wednesday, 21 September to post. We will be using vectors with relative motion to describe this phenomenon.

(You must include your name to get credit.)

Wednesday, 14 September 2011

Well this is the first blog entry for the year. Today we did a brief introduction to Vectors. 5th block went much smoother than 3rd. I owe 3rd a better explanation; I will complete that on Friday. I will also be posting our notes on this blog at a later time. I am glad to be back, and I appreciate your enthusiasm. 

11 May

Test Today!!!

6 and 9 May

We worked on our study guides for the test on Wednesday. Here is the answer key.

2 May

Today we diagrammed lenses. I will post notes below.

The homework was Pg 588 #24-26

27 and 29 April

Today we conducted an index of refraction lab. Some of us pretended to be Darth Vader and destroyed Alderaan.  Other decided to be good and kill cancer. The point of the lab was to measure a substances index of refraction, and then apply that to real life to make a laser bend to hit a target on the wall.

25 April

Today we talked about refraction of light through transparent objects.

Key things to note.

• As light move from less dense materials to denser materials the speed of the photon actually slows down. As it moves back out into the less dense material it speeds up again.
• When light is incident on a transparent object perpendicular to the surface of the object there is no refraction.
• As light moves from less dense to more dense, the ray bends towards the normal. From more to less it will bend away from the normal.
• Each color (wave length/ frequency) refracts differently. blue the most and red the least.
• Snell's law:

n₁sinθ₁=n₂sinθ₂

• n= index of refraction, the ratio between the speed of light in a vacuum and the speed of light in the transparent object.

Homework is Pg. 587 #10-14