Temperature, heat, and cooling curves


Monday featured the Eureka video playlist. Although an absolutely ancient set of videos, I come back to the dance of the molecules over and over again during the following week. 

Wednesday saw a compression of the temperature material to fit in the return of the modes of movement of heat energy to the curriculum. This term the three laws of thermodynamics were also gratuitously tossed into the tail end of the lecture. Students shouldn't leave a physics courses with meeting chaos and disorder.

The board was worked in a random order. Temperatures led on the right side, then moving heat on the left board, finally the three laws of thermodynamics on the left side of the right board. Poor blackboard technique. I was thinking that the boards might remain unerased, hence I put the temperatures far right expecting to use the left board for lab on Thursday.

The 150 ml beakers were used for the laboratory. The 100 ml beakers were deemed too small. 


The 150 ml beakers cool sufficiently in 55 minutes to demonstrate the cooling curve without cooling too quickly. Larger beakers would not approach room temperature on an hour time frame. 


Room temperature was around 26°C 


Or 28°C depending on the thermometer.

The students were asked to predict the relationship between time and temperature graphically. Lower left is Moira's prediction. She had the insight to know that this would be the behavior. Tikikos correctly verbally described that the temperature would fall the fastest when the temperature was the highest. 

Alisha, Jaysleen, Stacy

Photos provide evidence with a time stamp of who was there and when. The combination of late arrivals and waiting for the water to boil meant that timing started at straight up 9:00 AM. This made the Fibonacci based timings easy. 

McGievens, Mor-Jacinta, Moira, Leona

Lidy-Loreen, Tikikos


Mor-Jacinta and McGievens plotting data in Desmos

Moira and Leona entering data

Are students switching among apps? Of course. I see faculty doing the same in meetings. This is the new workplace. Distracted and multi-threaded. 

Jaysleen and Stacy

Eytriann and Alisha at 9:19

Tikikos and Lidy-Loreen


Left board post-lab


Right board post-lab. The equation is introduced between the 34th minute and the 55th minute.

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