Physical Science 20 - March 23

Hello everyone.  Yesterday we had a substitute in and he started the Heat unit with you.  Students learned about Kinetic Molecular Theory yesterday and today we finished up those notes.  There was no assignment with this information.  The powerpoint for this unit is in a new folder called Heat.  This powerpoint is labelled Kinetic Molecular Theory.  If you were away for the last 2 days, you simply need to get these notes.

On Monday, we are having an exam on Stoichiometry.  It will be an open book exam.  Make sure you study for it over the weekend though.  Have a great weekend.

Physics 30 - March 21

Today we started the third unit in Physics 30.  We began looking at the physical definition of work and what work is.  We did examples 1-3 and looked at some special situations where work is zero.  Students then had the remainder of class to work on Assignment 3.1. We will take this up tomorrow.  We are moving on tomorrow to look at the concept of power.

Reminder of your in class assignment tomorrow on the last half of Unit 2.  Study assignments 2.5-2.7.

Physical Science 20 - March 21

Today we went over the homework from yesterday.  After that, we then learned how to calculate a percent yield.  This is a value that shows you how much product the reaction actually yielded.  These problems are just like a normal stoichiometry problem but you get an extra piece of information.  This extra piece is usually the actual yield of a product or sometimes the percent yield.  We went through 1 example in class and then students worked on Homework C26.  The notes today were on slides 26-30 in the Stoichiometry powerpoint.

Homework C26 is also the last assignment in Chemistry.  That means we will be having a midterm examination to wrap up the chemistry portion of the course.  Before this however there will be an exam in stoichiometry.  That exam will occur on Monday, March 27.  The midterm exam is scheduled for Thursday, March 30.

Physics 30 - March 20

Today in class we examined uniform circular motion.  This is a type of motion that happens with a constant speed but a changing direction.  A force called the centripetal force causes this type of motion.  We learned how to calculate the centripetal force along with the centripetal acceleration.  We then worked through a couple of examples (#19-22) today and students finished the class by working on Assignment 2.7.  Students will need to know it for the next in class assignment on Wednesday.  It is on Assignments 2.5 to 2.7.

Physical Science 20 - March 20

Happy first day of spring everyone!  Too bad Mother Nature didn't get the memo.

Today in class students learned how to figure out the limiting reactant in a stoichiometry problem.  This is a type of problem where you are given certain amount of each reactant and you have to determine how much product will be formed.  This involves doing stoichiometry twice to figure out how much product will be formed with each amount of reactant.  Whichever ones produces the lower amount of product is therefore your limiting reactant.  It LIMITS the amount of product you can form.  We went through an example that outlined this process and then students had time to work on Homework C25 and #15 and 16 from Homework C24.  Notes today were on slides 16-24 of the Stoichiometry powerpoint.

Physics 30 - March 17

Today in class students were able to work on their lab reports for the lab they did yesterday.  As well, I gave them sometime to work on Assignment 2.6 which was assigned yesterday.  The lab reports are due on Monday.  We will cover our last concept for this unit on Monday.  It is called uniform circular motion.  Have a great weekend everyone.

Physical Science 20 - March 17

Happy St Paddy's Day everyone.  Today students were lucky enough to write their stoichiometry quizzes to start the class.  Afterwards, they finished up the stoichiometry lab by measuring the amount of copper produced as well as the amount of aluminum used.  Students then spent the remainder of class writing their lab reports for this lab.  Those lab reports are due on Monday.  On Monday we will continue on with stoichiometry by learning about limiting reactants.