Interesting electronegativity specs at Webelements.com

There is an interesting list of Fluorine electronegativity specs at Webelements.com to look at.

The destiny of your brains

There are going to be a few real brain burners on Exam 2 and at least one of them will be in multiple choice.

I therefore predict that multiple crania will experience high temperatures at which human brains begin to fry. Just a theory.

That being the case, make sure to study HARD. Your other destiny must be to crush with impunity all midterm exams of Dr. B!

Homework 15 ready

Homework 15 is ready to launch, which it will do at 3 PM today. There are two brain burners that will challenge everyone!

Due on Monday.

Brain burners ahead

The exam is ready for tomorrow, including some nifty brain burners.

Excellent.

Exam 3 rescheduled for Thursday sec. 0M02

CHANGE OF PLAN: Exam 3 today is rescheduled for next Thursday for sec. 0M02. No class today only.

Sec. 0M01 will test on schedule, next Tuesday.

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Stay safe and keep your eyes on the skies.

Brain burner yesterday got crushed.

The SMA brain burner on yesterday's exam, about two constituent forces, got crushed. Well over 2/3 of the class got it correct.

1. big disaster for Dr. B. :(
2. Big $$ for students. :)

OK

Homework is GO for launch.

You may now try Homework 5, for some basic questions plus a few brain burners.

Aristotle and Mendeleev

Study question:

Aristotle had a list of four elements. Mendeléev's table, now carrying over 100 elements, is not just a list but a periodic table. What is the physical basis for the periodicity in the table of the elements invented by Mendeléev?

Interesting codes, section 0004

I just spent 30 minutes reading and analyzing your codes for SMA question #1. Very interesting. I decided to make it a 2 point question, and I am giving partial credit for some of the unconventional codes.

Effectively, this means SMA #1 is 1 regular point and one bonus point.

As a result dozen students nabbed 4 points on SMA, 2 regular and 2 bonus. I josh you guys about brain burners, but when I can see what you are thinking and award extra points, it gives me great joy.

Brain burner alert

You are going to see some lovely brain burners in HW 16 and HW 17 at lunchtime or so. SWEEEEEEEEET!

Homework 21 is ready

Your last regular homework assignment for the semester is now up, HW 21. It is due on Monday afternoon, as usual.

Be prepared for mental defibrillation of maximum extent: the right hand rule is in this homework!!

We will also have a maga-review bonus HW on Monday evening, as a kick start to your final exam prep.

Asbestos thinking cap today: brain-burner in HW 17

Homework 17 is now ready:

1. a few conceptual questions on the electrostatic field, and
2. some thermal energy practice, including one lovely brain-burner.

Since it has such a nice brain-burner, I have set this assignment to give you 5 attempts!

As always, it is due by class time on Wednesday!

HW 14 is up, and some tough brain burners

There are a few brain burners in HW 14, which is now up and ready for study. You will want to have your lecture notes plus the textbook (chapters 20 and 21) handy.

HW 8 is ready, but make sure to read...

Homework assignment #8 is now ready to go, due Thursday morning. Before hitting the HW, make sure to read the Halley and Newton biographical blurbs in the Lecture Files. The last exercise is a brain-burner, meltdown time. Excellent.

Be ready with calculator!

Last brain-burner, midterm, think announcement of Fall 2007

Today's midterm exam has some true-false questions and several basic calculations, in addition to the usual one or two brain burners.

So we want to start ultra-fast, minimum possible delay.

Have your calculator ready to go as soon as you sit down. The calculations themselves are not tricky, but we want to do them as rapidly and accurately as possible so that you have time to THINK!

Also: I am only going to make two time announcements: 15 minutes to go and 5 minutes to go. This will cut down on distraction.

Heat exchange combo homework, #18 = GO FOR LAUNCH

I just finished the next homework assignment, and it is a combo assignment, all about one heat exchange process. It has a brain burner and a cranium crusher.

Naturally, I cannot tell you what is going to be on the exam Wednesday, but you MIGHT find it helpful to study this combo HW and know it cold! :)

Don't forget to look over the Enigma machines.

Quantum physics, photons and ping pong balls

Here is an interesting news article about quantum states and how they work, as an elaboration of my comments in lecture this morning.

Blurb:

Researchers have shown that removing a photon from a laser beam can lead to it containing more photons than it had before... Measuring position and momentum in different orders produces different results. "You are working at the quantum level," explains Marco Bellini from the National Institute of Applied Optics in Florence, Italy. "If you did it with ping-pong balls it wouldn't work this way," he says.
K. Sanderson, News@Nature.com, 27 Sept. 2007

Read more (while on campus)

Read more (if off campus)

Homework 4 is UP

There is a new homework assignment up and ready for you. Sorry, it is a bit late. You can have til dinner time, Friday, to complete it. Look in the yellow pickup truck on our Webcourses homepage.

One of the questions is a brain-burner.