Surprisingly (to me) I haven’t talked about the Daily Desmos project on this internetsblog. Daily Desmos is a project that I’ve been involved with since March. It has daily graphing challenges that you can use the desmos graphing utility to solve.
We would love to have some new contributors to the Daily Desmos project.
Do you enjoy creating interesting graphs?
Do you want to help out a project that is trying to refocus on being more useful in classrooms?
Do you want to be included in the ranks of the illustrious DD crew (Sadie Estrella, Kate Nowak, Jessica Algebrainiac, Michael Fenton, Me, Justin Lanier, Sam Shah, or our first retiree Michael Pershan)?
To limit the anxiety that is natural with extra responsibilities during the school year, we’ve decided to create a 4 month term. If at the end of this term you feel you’d like to sign up again then you are free to do so. You may also appoint a successor to your position. Or leave the seat open to an open call. Up to you.
There have been a couple of questions regarding the validity of my measuring process. The one that irked me the most was the fact that I had never measured the weight of the wafers of the Double Stuf. Was it possible that the wafers for the Oreo and Double Stuf were different? They have a different stamp on the top. Were they different weights too?
Previously I had found it very difficult to remove a wafer without any creme remnents from a Double Stuf. It always left some residue on the wafer. However, a local news channel came over (for my last interview, I’m done) and brought a box of Oreos and a box of Double Stuf. After the interview, the cameraman asked if I could unbox the Oreos and take them apart for the B-roll footage to be played while I was talking. However this time the wafers came off the Double Stuf with no problem at all.
I could find the answer to the biggest issue with my methodology in measuring the Oreos! All my questions would be answered! This was very exciting! (Well not really, but I was interested.)
So to recalculate. 23 Double Stuf wafers weigh 100g, so each wafer weighs about 4.35 g. Meanwhile the average Original Oreo wafer weighs about 4.04 g. The average Double Stuf Oreo weighs 14.67g, and so the Double Stuf creme weighs 14.67 – 2(4.35) = 5.97 g.
DS creme / Oreo creme = 5.97 / 3.48 = 1.7 stuf.
Conclusive? Heck no. Do the measurement in your home or classroom. Prove me wrong. Measure the density of the stufs’. Are they different? How much does the creme cost compared to the wafer? Which has more calories? Do some fancy statistical measurements. Is averaging the best tool to be used in the calculations?
Professor Don out.
So things have gone a bit crazy lately. While on summer vacation, this happened:
In the original post where my class suggests that the Double Stuf Oreo is only 1.86x stuffed, the data set is small. There were several groups all working on their own measurements so they didn’t have many cookies to work with.
After all the attention (I feel really weird about it), the math part of my brain had to verify the findings. And after all, I’d hate to be wrong on the internet.
Do the calculations yourself! Or I suppose you can it read here.
For me, this was never about proving Nabisco right or wrong. I don’t care about the “stuf”ing of the Oreos as long as they are delicious (which they are, Double Stuf is my favorite). This was about having the students do some great mathematical exploration on their own. Before doing this in class, I had no idea what the result would be. As a couple of the groups proved, you can show that they are double “stuf”ed by measuring the heights of the cookies.
From the weekly car talk puzzler:
RAY: A farmer had a 40-pound stone which he could use to weigh 40 pounds of feed; he would sell feed in 40 pounds, or bales of hay, or whatever. He had a balance scale; he put the stone on one side and pile the other side with feed or hay, and when it balanced, that’s it.
RAY: A neighbor borrows the stone, but he had to apologize when he returned it, broken into four pieces. The farmer who owned the stone later told the neighbor that he actually had done him a favor. The pieces of the broken stone could now be used to weigh any item, assuming those items were in one-pound increments, from one pound to 40.
RAY: Yeah, that would be good. What were the weights of the four individual stones? So if you want to weigh one pound, six pounds, 11 pounds, 22 pounds, 39 pounds — how would you use the stones, the thing you are weighing, and the balance beam?
RAY: Remember that. And here’s the hint: how would you weigh two pounds? That’s the question. I could give a further hint –
TOM: No, don’t. That is great!
RAY: Yeah, till next week. Next week it’ll be in the dog house.
Think you know? Drop Ray a note!
Linked from the Visualizing Math blog, a cool simulation of bouncing balls with randomized gravity and bouncing coefficients.
Check out the video too.
I had to make this myself (deja vu?). Here’s what I made (processing 2.0):
Can you create any modifications from this source code? Getting started is relatively easy: download processing 2.0.1, paste the source code in and press run.
Note: Thanks to the Math open reference for an applet to calculate the vertex coordinates for the hexagon and pentagon and saving me a little time.
@fawnpnguyen whoa. Need to try and make this.
— Dan Anderson (@dandersod) June 4, 2013
I started off and used VPython to create the fractal, but it was slow and buggy. Here’s a movie of my first attempt. When you click you create a new “seed” for the fractal to start.
So I rewrote it in Processing.org (2.0 just came out!), and the results are far more satisfying. Left click to start a seed, and right click to clear the scene. Check it out!
RAY: Tommy, Dougie and I are sitting around the office one day at Car Talk Plaza. We were noticing how dingy the place looked. We’d been there 15 years, and the place had never been painted. So, we decided to paint Car Talk Plaza.
We didn’t know which team of us was going to do it, so we sat down and decided to do a little math. We determined that Tommy and I together could paint the entire Car Talk plaza in 10 days. After all, we had a lot of painting experience as kids, having painted Dad’s car a couple of times with brushes.
Dougie and I could do it in 15 days. And, if Doug and Tom worked together, they could do it in 30 days.
The question is how long would it take each of us, painting by ourselves, to paint the whole of Car Talk Plaza?
Are big ice cubes worth it? Do they dilute your drink slower?
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