Friday, December 21, 2007

On Friday's class we did a lab on friction, the equipment that we used for the lab are:

• 5 bricks
• a dynamics cart
• string
• brown wrapping paper
• wax paper
• sand paper
• plastic wrap
• 2 spring scales
• masking tape

Basically we measured the force of friction through many procedures in the lab.

Reminders!

1. Finish the questions on the last page
2. Create a graph for table 9-6 (Data and Observations)

Finally the next scribe will be.... Awot!

Nature of Light Review: Part 2

Hiii! so im scribe today since kadeem told me in class.

So first things first, We started the class by going over questions 17, 18, 19 and 20. Ms K. has posted the answers up already. thanks Ms. k! hehe

Then she gave us a review on the smart board. And went over it with us. and agian she has posted it for everyone. Thanks agian Ms k! She's so nice.

And that is all we did in class today.
Test tomorrow!
GOOD LUCK. everyone!

Next scribe is .... roxee!!)

Lab: Young's Experiment

Today in class we did a lab, called Young's experiment and for the people who have missed this class here is a picture of the experiment that we have done.


Lab Reminders:
Your results of the wave length of the experiment should be around
wave length red = 6.5 x 10 ^-7
wave length blue = 4.3 x 10 ^-7

Problem booklet:
We're going to correct questions 13 14 15 on Monday, and for homework we have to do questions 16 - 19

Finally the next scribe will be.... Pr1nce!!

Waves On Snaky

Hey this is Shelly and I'm the scribe for the day. In class we have gone through the questions in "Concepts-Development Practice Page Chapter 25: Vibrations and Waves", or work sheet 25-1 for short. For those who have missed this class here are the correct answers:

1) a. Wavelength = 6.7 cm
b. Amplitude = 1.5 cm
2) Frequency = 0.5 hertz
Period = 2 seconds
3) Statement 1: The period of a 440-hertz sound wave is 0.0023 second
Statement 2: A marine weather station reports waves along the shore that are 8 seconds apart. The frequency of the wave is therefore 0.125 hertz.
4) a. Frequency = 600Hz
b. Wavelength = 0.57m
5) a. Distance = 30m
b. The distance decreases
6) a. Wavelength = 30cm
b. The wavelength decreases
7) Speed = 2m/s
Period = 0.5s
8) Speed = 3m/s
Period = 0.5s
9) Automobile moves towards the listener, the sound of its horn = high pitched
Automobile moves away from the listener the sound of its horn = low pitched
10) Wave frequency

Then we Ms. K got the class (whats left of it) in groups of 3 and assign a lab about the transverse waves and the longitudinal waves that involves the slinky, and in tomorrow 's class we'll continue to work on the lab.

HOMEWORK: Wave Problems: questions 1 -5 page 12 in the handout (Grade 11 Physics: Waves in One Dimension)

Tomorrows scribe will be....... Jenny!