Monday Feb 7, 2010

HW due tomorrow:
Hand in signed course expectation form
Hand in signed Parent Notification form
Cover both textbooks
Do Quia quiz on A1 General Knowledge

Hand out:
Student Profile - Students complete and put in bin for 10 pts
Course Expectation Form
Student and Parent Form for Course Expectations - students return for 5 pts
Parent Notification Form - Students return one signed copy for 10 pts. (Keep the other at home since it has my contact info)
Hand out Tsokos books

Go over Expectation Form
Hand out Quia Passwords
Assign Quia Quiz on A1 - General Knowledge
Hand out flowchart 1.1

Get Hewitt textbooks

Go over rapid estimation problem of how many atoms are in the Sun
First asked for guestimates on answer.
Used circumference of Earth from definition of meter
Used diameter of Sun since ~100 Earths span the Sun

Derived tidal equation - used fact that Moon just covers Earth in total eclipse to show, for Moon and Earth that ratio of diameter to distance is the same. Ratio of tidal forces becomes ratio of densities. Moon is rock. Moon's effect on tides ~ 2.2 times that of Sun so density ~ 2.2 times that of Sun. Use density of Sun to be about 1.

Used value of mole to calculate number of atoms in Sun.

Introduction to uncertainties:
Handed out a block of aluminum to each student and asked them to find the density of that piece of metal.