Cooling curves

Monday opened with a video playlist on heat and temperature. 

I opened the Wednesday lecture by trying to show what Fahrenheit was thought to be trying to create - a scale that could be be subdivided by repeated bisections. This led to a 32 point scale between the freezing point of a saline solution and a fresh water solution. I gather he might have hoped that human body temperature was 64 points above 32 at 96. Anders Celsius' system was easier to describe but perhaps slightly harder to inscribe on a thermometer. Celsius is the only one I can recreate in A101, so Celsius is the only logical option. I do not teach conversions.

I couldn't obtain a dew point depression, I am unclear as to why I could not. 

The lab is now a mature lab with only ongoing tweaks. The timing is optimal for my gathering of data. the equation was perhaps problematic, a modification to use (100-T₀) is proposed further below.  

Desmos

I was entering data in real time and then pulling up the current Desmos on the SMARTboard. I did all data entry and editing on the tablet, not on the SMARTboard.

100 ml beakers were used by everyone this term. 

Desmos 11:00 section

The increasing time gaps provide increasing amounts of time to discuss what is happening. Then in around 13 to 21 minutes I start to ask what the model might be. 


This term I started to enter equations in the time gap leading into 21 minutes. 


I haven't yet settled on an equation, and the above is not what I put on the board. The above is what I used to prevent variable collisions in my equations. The students were recommended to use:
T₁~T₂b^(t₁)+T₀  I could not use this equation because T₂ was already in use on my graph. 



I knew I shouldn't have gotten that fancy with my equation, but you should have stuck to T₁~T₂b^(t₁)+T₀  The "range" and "room" did not wind up in the subscripts and so they showed up as parameters. Maybe next term I should use T₁~(100-T₀)b^(t₁)+T₀

Desmos

Proposed future equation using the second table above. T_5 would be T₀ in the actual lab.

Malachi and Mia


Rindy, Emleen, Wayne


Stella, Memichin


Renae, Alathea, and Pevirleen

On Friday the class went around campus with the remote temperature measuring device as per prior terms.

Comments

Post a Comment

Popular posts from this blog

Plotting polar coordinates in Desmos and a vector addition demonstrator

Image
In an earlier post I noted that Desmos did not directly plot polar coordinates. Not only was I incorrect, but Desmos responded to my blog to correct me! Although I had at some point seen that one could define a function f(x)=3x+5 and then have Desmos calculate f(6), I had not absorbed how this might be used to plot polar coordinates. The above works beautifully . Realizing that I could effectively program Desmos, I applied this thinking to demonstrating how to add two vectors when given the magnitudes m and the direction angles theta. The graph calculates the i and j components for the two vectors and then adds the vectors, graphically displaying the result while also providing information on the magnitude and direction of the vector sum. m1 and theta1 are the magnitude and direction angle for one of the two vectors, m2 and theta2 are the magnitude and direction for the other vector. All four are dynamically interactive and can be changed. The diagram purports to illustra
Read more

Setting up a boxplot chart in Google Sheets with multiple boxplots on a single chart

Image
The  Google Statistics  add-on for Google Sheets can display multiple boxplots in a single chart. The key is the layout of the data. One column should be the variable by which the data is to be grouped, the other column should be the data to be box plotted. Set up the Statistics add-on with the data to be plotted as the variable, and the grouping column as the "by" variable. In this image I had deselected all but the boxplot option, the result was the appearance of the Moment, Standard errors, and Confidence intervals options. The default is apparently a 95% confidence interval for the mean. The result is multiple boxplots on a single chart with a common scale. The new tab that is created also quotes 95% confidence intervals for the mean. Note that as of 2018 the Google Statistics add-on cannot be found by search in the add-ons. In addition, as of May 2018 the add-on no longer verifies, possibly due to the add-on not having been updated since August 2017. One may ha
Read more

Traditional food dishes of Micronesia

Image
Clara, Jennette, and Joanie presented ground hard taro cooked in an umw, effectively a hot rock oven. Pohnpeian: rotama. Pingelapese: sero. Mwoakillese: rodma. Mortlockese: Amahd. Kosrae: rodoma. After cooking in an umw the rotama is pounded with the petiole of a palm frond. Rotama is made from hard or swamp taro, known as mwahng on Pohnpei, mweian on Pingalap, pula in Mortlockese, and pahsruhk on Kosrae. In traditional times on the outer islands the women had primary responsibility for tending the taro while the men handled fishing and climbing tasks. Joesen and Noeleen presented fermented breadfruit from the outer islands of Yap such as Woleai and Eauripik. The raw ingredients were actually brought in from Yap, Noeleen prepared the maare.  The leaf wrap is ti leaf - Cordyline fruticosa. Pauleen, Barnson, Trisha, Verginia, Con-ray, and Maylanda from Kitti, Pohnpei brought in mahi umw, koahpnoair koakihr, and uht sukusuk. Above is breadfruit umw, mahi umw, one o
Read more