Friday, September 17, 2010
Fri-Day 1
Physics - the weekend HW, which I will check on Monday,
is to do the problems in Vectors 4 that we did not cover in class:
That is, questions 1 and 2.You can try question 4, but we will do that question together in class.
Our first unit test will be given next Wednesday (Part 1, multiple choice) and Thursday (Part 2, written response).
You can start practicing for the test by doing the multiple choice exam questions at the end of our unit 1 vector packet.
We saw how to calculate the angle of the resultant relative to a given axis; we did so by taking the inverse tangent of the ratio of the opposite side to the adjacent side of the right triangle that forms the resultant.
We the did two types of problems in vectors 4:
1. Resolving a given vector into its horizontal (x) and vertical (y) components.
2. Adding two or more vectors by resolving each vector into its horizontal (x) and vertical (y) components, and then by separately adding these horizontal and vertical components.
We use these sums and pythagorean formula to get the magnitude of the resultant;
then we use the inverse tangent formula to get the angle of the resultant.
Overall, we saw the EXTREME IMPORTANCE of :
DRAWING a sketch of the information in the question so that you have a good idea of what the correct answer should look like
and
LABELING all positive and negative signs and directions
and consistently WRITING UNITS for each quantity.
Keep practicing this method to be confident that you are setting up these problems correctly.
Writing and plugging in the given formulas will be the easier mechanical part.
Have a great weekend.
AP Chem - we discussed the classification of every type of matter, noting the difference between substance and mixture, element and compound, and compound and mixture.
We discussed the basis for the four common techniques used to separate mixtures (11th period was truncated, so I will discuss that with you all on Monday).
We began our new mostly quantitative unit by discussing the basis of the law of constant composition (in compounds).
I posted some Classification of Matter worksheets with answer keys in the Unit 1 Files section on Blackboard.
Do those worksheets and then check your answers.
is to do the problems in Vectors 4 that we did not cover in class:
That is, questions 1 and 2.You can try question 4, but we will do that question together in class.
Our first unit test will be given next Wednesday (Part 1, multiple choice) and Thursday (Part 2, written response).
You can start practicing for the test by doing the multiple choice exam questions at the end of our unit 1 vector packet.
We saw how to calculate the angle of the resultant relative to a given axis; we did so by taking the inverse tangent of the ratio of the opposite side to the adjacent side of the right triangle that forms the resultant.
We the did two types of problems in vectors 4:
1. Resolving a given vector into its horizontal (x) and vertical (y) components.
2. Adding two or more vectors by resolving each vector into its horizontal (x) and vertical (y) components, and then by separately adding these horizontal and vertical components.
We use these sums and pythagorean formula to get the magnitude of the resultant;
then we use the inverse tangent formula to get the angle of the resultant.
Overall, we saw the EXTREME IMPORTANCE of :
DRAWING a sketch of the information in the question so that you have a good idea of what the correct answer should look like
and
LABELING all positive and negative signs and directions
and consistently WRITING UNITS for each quantity.
Keep practicing this method to be confident that you are setting up these problems correctly.
Writing and plugging in the given formulas will be the easier mechanical part.
Have a great weekend.
AP Chem - we discussed the classification of every type of matter, noting the difference between substance and mixture, element and compound, and compound and mixture.
We discussed the basis for the four common techniques used to separate mixtures (11th period was truncated, so I will discuss that with you all on Monday).
We began our new mostly quantitative unit by discussing the basis of the law of constant composition (in compounds).
I posted some Classification of Matter worksheets with answer keys in the Unit 1 Files section on Blackboard.
Do those worksheets and then check your answers.
# posted by C @ 8:50 AM 
