Heat conduction to Finding Binky

With MITC not available for the Monday video, I opted to try downloading the heat videos to ChromeBook and then running the videos from the ChromeBook in A101. This worked better than I had expected. 

The video series is from the 1980s. MITC has six of the videos on VCR tape. With summer classes being 90 minutes, I took advantage of the availability online of a longer set running from number 16 all the way to conduction up around video 28 or thereabouts.

Temperature and heat continued on Tuesday with ice water, boiling water, human temperature in the morning. This was prefaced by reviewing the prior Friday's test. The class wrapped up with going on the porch to use the remote surface temperature probe to determine that the while the classroom was 28 Celsius, and outdoor air temperature in the sun was 32, the sunny sidewalk was 46 Celsisus.

Finding Binky was preceded by a stormy night with thunder and rain.

The sun would crack the morning sky and the Binky hide was on.

Sunrise off…

An introduction to pi and radians

The summer algebra and trigonometry course is a first encounter with radians for many if not almost all of my students. I like to start out on the lawn with a big circle.

Starting at the generator, Madona held a line with a radius of 44 feet, Suzanne walked behind her with the surveyor's wheel. At 90° the wheel had measured 70 feet or about 1.59 radians.

Afilina was the center of the circle, Patty and Herder on the right.

Coming up to 180° in the morning class. The weather was sunny, already hot, but cooperative. The grass was still wet, but not overly so. At 180° the arclength was 144 and for 3.27 radians (against 3.14 theoretic).

Madona passes David out near 180°.


Coming down to 270° the arclength was 218 feet or 4.95 radians. The surveyor's wheel measures feet, in algebra and trigonometry leaving measurements in feet is easier.

Reading the measurement on the wheel.

Headed back to 0 radians.

Zero radians. 298 feet. 6.77 radians as measured.

In the afternoon section I ba…

Summer physical science labs one to five

Summer 2017 launched as a two course summer and then ramped up to three courses plus the laboratory section. This summer the A204 laboratory was free at 12:30 which means the class can gather data and then go to the computer lab to write up their reports, share findings. This appears to be ideal for the class, better than having 11:00 to 12:30 free, and far better than 9:30 to 11:00 free. This should be planned for in the future.

The first laboratory explored the density of soap. This was really the first term during which Desmos was used from the get go, where no mention of spreadsheet options was made.

Lillibeth, Ronda and Herlinda
While students had copies of the table from the text, few students chose to use the pre-printed tables. Being a summer term, I also suggested that the students carry the text on their smartphones rather than acquiring a hard copy.

Jayme and Shamrock carving soap
Mayleen and Iva Nicole
Janet Alpet and Stephanie Edward. 
Scientific calculators were present …