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** There will be an office hour Thu 17, 3:10-4pm, or by appointments.

* Explained and derived the blackhole of an object with mass M

** Started by reviewing E= M

** In most planetary motions (and our daily motions on the Earth), we use the approximate form, which works exceedingly well.

** From the escape velocity, we can derive the blackhole radius of an object with mass M.

* View the movie "The Cosmos and The String Theory (The Theory of Everything)" made by the students in Dr. Chau's 2002 Davis Honor Challenge seminar course. The movie gives an overview of our understanding of the universe, and the rest of our Phy10B course materials.

Find good web sites on "Fission and Dirty Bombs", that contains laymen info about

** what the nuclear reactions are involved in the commonly discussed so-called dirty bombs;

** what the nuclear reactions are involved in the reactors;

** what the nuclear reactions are involved in the first nuclear bomb that dropped in Hiroshima.

* Distributed graded Quiz2, solutions, and statistics; and HW9 assignment.

* Discussed HW9

* Discussed about Quiz3 and the Final.

* Students are encouraged to ask Dr. Chau questions and

We will discuss the material of week as listed in the Reading Assignments. Please have a first reading of them before the class. As indicated before, you can skip the Math Insights in the first reading. I will discuss the necessary Math Insights in Class and elaborate them further in Discussions, making them simpler, more precise and up to date.

Week-9 (2/27-3/5 )