New YouTube links of the spectra of H and He.

I just now set up links in Webcourses to digital video from my lecture section in January, showing hydrogen's and helium's discrete spectra.

Handy conversion factors

Everybody gets worried about converting between Fahrenheit and Kelvin, meters and inches, so on and so forth. Therefore, I decided to get you a list of really handy, very scientific conversion factors:

Handy Conversions

Ratio of an igloo's circumference to its diameter: Eskimo Pi

2000 pounds of Chinese soup: Won ton

1 millionth of a mouthwash: 1 microscope

Time between slipping on a peel and smacking the pavement:
1 bananosecond

Weight an evangelist carries with God: 1 billigram

Time it takes to sail 220 yards at 1 nautical mile per hour:
Knot-furlong

365.25 days of drinking low-calorie beer because it's less filling:
1 lite year

16.5 feet in the Twilight Zone: 1 Rod Serling

Half of a large intestine: 1 semicolon

1000 aches: 1 kilohurtz

Basic unit of laryngitis: 1 hoarsepower

Shortest distance between two jokes: A straight line
(think about it for a moment)

453.6 graham crackers: 1 pound cake

1 million microphones: 1 megaphone

1 million bicycles: 2 megacycles

2000 mockingbirds: two kilomockingbirds (work on it...)

10 cards: 1 decacards

1 kilogram of falling figs: 1 Fig Newton

1000 cubic centimeters of wet socks: 1 literhosen

1 millionth of a fish: 1 microfiche

1 trillion pins: 1 terrapin

10 rations: 1 decoration

100 rations: 1 C-ration

2 monograms: 1 diagram

8 nickels: 2 paradigms

3 statute miles of intravenous surgical tubing at Yale University
Hospital: 1 I.V. League

New learning module UP

Your next learning module, featuring chapter 23 concepts of the atomic spectra, is up.

By the final exam, we will cover chapters 23 and 24.

Side note: the final examination is cumulative: any topic since January, including chapters 23 and 24.

Exam 3 today

Your third midterm exam will become available 12:15 PM or so. Until then, do not be surprised if it disappears, re-appears and then disappears again a few times -- because I am messing around with the exam.

Last learning module for Exam 3

The last learning module to go through before Exam 3 is now up in Webcourses. It involves electromagnetic radiation.

GO GO GO!

Two new mini-podcasts, about heating up water and aluminum

I just set up two new mine-podcasts in our iTunes U area. They are examples worked out for heating and melting water and aluminum, from chapter 13 concepts. Take a look and work out Ex. 77 on p. 281 after viewing these podcasts.