Density of soap
Monday saw extension of regular registration due to database and power issues during regular registration. This pushed add/drop to Tuesday. Monday was a brief introduction to the course.
Tuesday was Tech Tuesday with an assignment requiring screen capture and inclusion of the screenshot in a submitted document. This worked better than I could have hoped for: the process of learning to screenshot and submit made the laboratory the next day much easier for the students. If there is a way to incorporate that Tech Tuesday into the regular term, it would be worthy. Perhaps that is what we do on Monday, leaving Wednesday to cover the metric system and density.
Wednesday began with an introduction to space, time, matter, and the metric system. Following this the morning session covered density. This combination is only really possible in the summer session where there is an 80 minute morning period.
The morning session required more gear than the laboratory. On the upside, everything needed for the laboratory was in place except the soap. The lab is down to six paring knives.
This term I forgot the meter stick as part of the metric system introduction.
The morning session included measuring the density of PVC board of different sizes. The values all came out to around 0.5 grams per cubic centimeter.
The left board at the end of the morning session.
The right board. I considered going to get the alphabet blocks to demonstrate volume, but held off doing so. And time would prove to be tight even with an 80 minute period.
For the laboratory I picked up a bar of Dove Pampering for two dollars across the road. I wanted one of those exotic Malaysian/Indonesian soaps, but A1 is no longer stocking any of those.
The Dove bar was not rectangular, so I had to cut the bar down to a rectangular shape. The bar, however, gave me what I wanted with a density of 1.22 grams per cubic centimeter, allowing me to demonstrate that the bar would sink when placed in water.
Gilbert and Rollin
Dove data with two additional measurements done post hoc to get to five data points.
Relatively and sufficiently linear.
Covered the use of p for rho, opted to use p₁ for some sort of consistency. I think that is the way to go with Desmos. Also sets up v₁, v₂, v₃ for Thursday.
Wrap up included coverage of the report format and a demonstration of building the report done using Smart Mirror - which disconnects in five minutes or less - and my cell phone. I later shared the demonstration report with the students.
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