magnetic fields and current

Oh dear its Anthony. Sorry about the delayed scribe post. I forgot about it yesterday. Ok anywho if we can recall we learned the right hand rule in grade 11. But for those who forgot about it lets do a refreshment on our old skills. Before we start let me mention a few things.

1) an electron is forced in the opposite direction of a proton.
2) the charge must be moving. A magnetic field will not influence the motion of a charged particle at rest.
3) the velocity of the moving charge must be perpendicular to that of the direction of the magnetic field.
here are easy steps to determine force direction.

*use this for proton

1) open your hand. Now point your fingers in the direction of the magnetic field.
2)rotate your hand so that your thumb points in the direction of the current.
3) look at your palm. the direction your palm is facing is the direction of the force acting upon the charge.

*use for electron

do steps 1-3 above but use your left hand! amazing it works! Because the electron acts opposite to the proton the left hand will work. Founded By Professor Cadonic.

next scribe is oliver

orbits

Hey its Ant. Sorry for late post. Been busy with work and family matters. But any who recap of Friday's class.

Mrs. K gave us a wonderful new song to learn with lyrics. Inverse square law by Michael Offut. I will be getting Chris his CD for Christmas. Next we finished off the class with a video on Kepler's three laws. I learned a few things from this video such as Mar's orbit is actually an ellipse and not a circle, Kepler's three laws of, course. They are as followed :

1. r = ED/ 1 + cos θ
2. DA/DT = constant
3. T^2 = (4π^2/GM ) a^3

By the end of class she gave us 3 homework sheets. They are:
1. chapter 11 gravitational interactions
2. concept - development practice page 12-1
3. Universal law of Gravitation

don't forget your projects are due on Wednesday, Dec. 5...i think.

next scribe is JEV

In class work time

hey its Anthony. I will be the scribe for today. I don't really know what to say. Today's class pretty much just slipped by without me learning anything new. The sub Mr. Whiteway just sat upfront and watched over us. We got two new worksheets to practice on. "advanced forces" and "Enrichment chapter 5". Alright test is on monday, remember to study. Also there is a question worth 5 bonus marks on mondays test to bring up your previous mark if you didn't do so well.

next scribe is OLIVER