Monday, September 13, 2010
Mon-Day 1
Physics - we compared and contrasted scalar and vector quantities. The main difference is that vector quantities, in addition to a magnitude, have a specific DIRECTION, e.g. 25 mph 20 degrees west of south (or 70 degrees south of west).
We then saw how to draw vectors, how to calculate a proper graph scale, and also how to graphically add vectors, doing the vectors 1 problems in the packet. I will scan a post the overhead graphs that we did today.
Since I did not have protractors for you to purchase in class ( I will soon, 50 cents per protractor - amazing bargain :) ), you do not have to hand in the homework problem (vectors 1 question 4 in the packet) for tomorrow. Just try to do it; if you do not have access to a protractor, you may estimate the angle.
Here is a link to some videos and animations showing the graphical method of adding vectors:
http://www.youtube.com/watch?v=pimr9I92GZY
http://video.google.com/videoplay?docid=-5528554074758763042#docid=736209380734386925
http://video.google.com/videoplay?docid=-5528554074758763042#
http://faraday.physics.utoronto.ca/PVB/Harrison/Flash/Vectors/Add2Vectors.html
http://faraday.physics.utoronto.ca/PVB/Harrison/Flash/Vectors/Add3Vectors.html
http://www.walter-fendt.de/ph14e/resultant.htm
We then saw how to draw vectors, how to calculate a proper graph scale, and also how to graphically add vectors, doing the vectors 1 problems in the packet. I will scan a post the overhead graphs that we did today.
Since I did not have protractors for you to purchase in class ( I will soon, 50 cents per protractor - amazing bargain :) ), you do not have to hand in the homework problem (vectors 1 question 4 in the packet) for tomorrow. Just try to do it; if you do not have access to a protractor, you may estimate the angle.
Here is a link to some videos and animations showing the graphical method of adding vectors:
http://www.youtube.com/watch?v=pimr9I92GZY
http://video.google.com/videoplay?docid=-5528554074758763042#docid=736209380734386925
http://video.google.com/videoplay?docid=-5528554074758763042#
http://faraday.physics.utoronto.ca/PVB/Harrison/Flash/Vectors/Add2Vectors.html
http://faraday.physics.utoronto.ca/PVB/Harrison/Flash/Vectors/Add3Vectors.html
http://www.walter-fendt.de/ph14e/resultant.htm
AP Chem - we looked at the basis for naming a given type of compound. We saw the explanation of the term "covalent bond" based on the simple principle of "positive attracts negative" and "negative repels negative".
We saw that there are really only eleven reactive nonmetals- these elements are the only ones that form covalently bonded molecules, so seeing any metal or polyatomic ion means that you cannot be looking at a molecule.
We began to look at ionic compounds and their bonds also.
I posted pics of today's "greenboard" on Blackboard.
# posted by C @ 11:06 AM 
