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Ross Cohen
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Ross Cohen

Professor Physics, Astronomy, and Physical Science


Contact Info:

Phone: 619-644-7825
Office: Bldg. 34, Room 161
Office Hours: Monday: 1:15 - 2:45 P.M.; Tuesday: 9:30 - 11:00 A.M. and 3:30 - 4:15 P.M.; Wednesday: 10:45 A.M. - 12:00 P.M.



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ASTR 110  Descriptive Astronomy

Course Notes:


Review Sheets
(from old exams)

Math Review for general education science students
5 pts. extra credit!
  • Wednesday, February 11, 1:00 P.M. - 2:30 P.M., 38C-343A
  • Thursday, February 12, 9:00 A.M. - 10:00 A.M., 53-538

Announcements & Schedule for T/Th class

You can now check all your grades on Blackboard.
Here are the instructions

PHYC 240  Electricity, Magnetism and Heat

You can check your grades using blackboard.  If you find that a grade has been entered incorrectly, let me know. 

On a computer connected to the internet, go to the address  Do not enter www first as part of the address.

Click on "User Login"
For “Username” enter firstname.lastname, lower case, no spaces, but a period between the first and last name.  
For “Password” enter your birthday in the format mmddyy.
This should be the same login you use for the computers in the physics/astronomy computer room.  If that doesn’t work, ask your instructor.

The  feature you will use is “My Grades.”  This is found on the left hand side of the screen near the top and allows you to see your grades as they have been entered.   You can check that your grades have been entered correctly and find out what your cumulative score is.  The cumulative score will be listed under something like "Tot. % date".  This shows your percentage score (with lowest items dropped as described in the syllabus) including all the work graded and entered by the given date.
  • Grossmont
  • Cuyamaca
A Member of the Grossmont-Cuyamaca Community College District