Parallel circuit and the brightness level of the light bulbs

Another crude but effective video from yesterday.



Thanks to Gloria S. for operating the HD cam. Good work, Gloria!!

P.S. I will drop the videos into iTunes U as soon as I drive up to campus this morning.

Combo circuit demonstration video, various formats

Crude but effective high-def 1080p video from today's lecture demonstration is now up. First up: the series of two light bulbs. You can view the YouTube version here or the higher quality version in iTunes U.

1. "Demonstrations" which holds the larger format video, or
2. "Demonstrations-mobile" which contain the smaller file "mobile" version, which might be faster if you are on iPhone.

Exam 3 is UP.

I just uploaded your scantron scores for Exam 3. The score is out of 40, since we did not use CPS, only scantron. I will be working on the gradebook here in Webcourses so that you can see your "best two out of three midterms" subtotal.

CPS threshhold

Right now, if you have 99 CPS answered, or more, you are on track for getting 24/24 points on your semester grade. That means you could have missed 16 questions -- one pre-exam SMA review, or about 3 average lectures.

If you have 95 CPS answered, or more, by my rounding up method, you also will get 24/24.

At 94 CPS answered, you will nab 23/24 for your semester grade. In general, if you are below 99 right now, you must solve this proportion:

yay

Friday's lecture is up on iTunes U now.

Homework 23

GO for launch on homework now. HW 23 requires a bit of reading in chapter 21 before you light into it.

This assignment is due on Monday, usual time.

Friday lecture podcast is up not up.

Friday's lecture is uploading now onto iTunes U, kind of poky, but it ought to be up in a few minutes.

Unfortunately, the upload speed into the iTunes U server is down to 1 kb per century, approximately. :(

Somewhere, the internet is running on citrus batteries, I guess.

So I will try to upload it later.

No news on exams yet

No news on exam scores yet. Scantron machines need to be dealt with. Bah!

Exams are getting scored; see you Friday for lecture.

Exams are in the process of being graded. Perhaps by Friday at lecture, we will have printouts.

By the way, Friday's lecture will have a battery demonstration and we will record in high-def digital video again, with volunteers from the audience. No sparks but definitely interesting.

Monday and Wednesday lectures next week will also have some demonstrations with cell phones and other electric systems. The cell phone demonstration will totally psych your mind.

Today's lecture is up on iTunes U.

Today's lecture on the electric field is now up on iTunes U.