dim dim transcript

Welcome to your Web Meeting.
Attendee2 has joined the meeting.
Attendee3 has joined the meeting.
Attendee4 has joined the meeting.
Attendee5 has joined the meeting.
Mr_K has joined the meeting.
Attendee6 has joined the meeting.
me: Nothing dirty now, folks. WCYDWT is a family program.
David L: maybe my Bamboo Pen will come in handy for this
Steve G.: Is the whole WORLD watching? Wow!
Ashli: with the delete key
me: Bamboo pen ... *drools*
Ashli: how do you like your bamboo pen?
David L: so far it's been great for custom vids for my class and for sending notes from class home to absent students
Attendee7 has joined the meeting.
David L: I bought the cheapest one - $60 or so, and it's pretty good.
Ashli: usb or bluetooth connect?
David L: The accuracy is ok, but I tend to write a little too small with it. It's USB
Ashli: humm, usable with a smartboard?
Ashli: i'm unwilling to shell out the cash for the airliner they sell
Steve G.: Not a fan of the Airliner. I don't know the bamboo pen, though.
Ashli: @steve I am researching it now as i'd not seen it before either
me: I love that.
Mr_K: I want to be able to use an Ipad as a tablet. And take a picture with it, display the picture, and then overlay on top of what you just took.
me: Texan.
Attendee8 has joined the meeting.
Attendee9 has joined the meeting.
sheng: West coast crowd mostly for now :)
Ashli: Represent!
Ashli: You can scoot the stars around by being in pointer mode, clicking on them, then using the arrows
Ashli: on your keyboard
Attendee10 has joined the meeting.
VoijaRisa: I'm in Misery. It's the show me state
Mr_K: Who's the black star in LA?
Attendee11 has joined the meeting.
sheng: Just in case
VoijaRisa: I hear you
Ashli: check to both
Aaron: c and hear
VoijaRisa: and see yo
Mr_K: radio check.
VoijaRisa: u
Attendee12 has joined the meeting.
Stacy: Roger that
Frank: weeeeeee :oD
David L: I used it with a smartboard and it was far easier than writing with the pens provided - the accuracy was much better and more natural to write with.
Attendee13 has joined the meeting.
Ashli: the music for the bamboo video is a little too happy.
Attendee14 has joined the meeting.
Ashli: @david does 'it' = bamboo or does 'it' = ipad?
Attendee15 has joined the meeting.
Mr_K: Huh. What decides what happens when you create a new white board?
Attendee16 has joined the meeting.
Mr_K: and 20 people - this could get silly.
David L: 'it' = SMARTboard
Aaron: yup
Ashli: check check
Mr_K: yep
Claire T:
Frank: sounds good
Peter: yeah
Stacy: check
Justin & Anna: AOK
David L: good here
Attendee17 has joined the meeting.
Attendee18 has joined the meeting.
Steve G.: lost my sound!
Attendee19 has joined the meeting.
me: http://www.mrmeyer.com/w​cydwt/live2/
me: http://www.mrmeyer.com/w​cydwt/live2/holesexcerpt​-H.264-300Kbps.mov
Attendee20 has joined the meeting.
Mr_K: Heh. I go camping there.
Attendee21 has joined the meeting.
Attendee14 has left the meeting.
Attendee22 has joined the meeting.
Steve G.: I was able to hear you before, Dan, but not anymore. I can hear the video sound, though. ???
Frank: *thumbs up*
VoijaRisa: *thumbs up*
Peter: thumbs up
MK: thumbs up
Stacy: thumbs up
Aaron: thumbs up
Claire T: thumbs up
MathZombie: I can't hear anything, but I just joined
Mr_K: tu
Ashli: thumbs up
MathZombie: thumbs up
Justin & Anna: thumbs up
Frank: "why are they digging holes?"
Aaron: does the shorter shovel really matter?
Mr_K: How much dirt is *not* dug up.
Ashli: how many holes has the camp dug so far?
Claire T: How much smaller will Magnet's hole be? (shorter shovel)
VoijaRisa: "Why the hell are they digging holes?"
me: how much dirt x-ray saving himself, really?
Peter: how long does it take to dig a standard hole?
sheng: How long did it characters to dig the holes in the beginning?
Stacy: How many holes have they dug?
Tricia: What is the depth of the hole
Steve G.: @Zombie How did you fix your sound?
Tansel: How long did it take to dig the hole
MathZombie: @steveit fixed itself, i didn't do anything
Justin & Anna: How much dirt is dug up per day?
Attendee16 has left the meeting.
Attendee20 has left the meeting.
kenburgin has left the meeting.
Lanie has left the meeting.
David L has joined the meeting.
Frank: mass
Ashli: weight
Stacy: volume
Frank: volume
VoijaRisa: volume: m^3
sheng: Volume
Frank: pounds
Ashli: kg
Justin & Anna: cubic feet
Frank: cubic feet
Aaron: cubic shovels?
Attendee23 has joined the meeting.
VoijaRisa: weight probably
Frank: pounds
Stacy: lbs
Mr_K: volume
Attendee24 has joined the meeting.
Ashli: lbs
Peter: pounds
Attendee25 has joined the meeting.
VoijaRisa: That begs the question how much dirt weighs
Mr_K: How much dirt *would* it take to fill your living room?
Steve G.: Stop then start "live" window fixed the sound problem.
Ashli: difference in size btwn the shovels and the actual size of at least one of the shovels
MathZombie: weight of dirt per cubic foot
VoijaRisa: Weight of dirt and extra length of shovel
Frank: how many days/ week?
Stacy: weight of dirt from one whole, prob converted from volume
sheng: average shoveled dirt weight. total weight and number of shovelings
Mr_K: Density of dirt
Peter: how many pounds of dirt in a normal hole? how much shorter is the new shovel?
David L: weight of dirt
Steve G.: Density of dirt, dimension
Aaron: mass of dirt, "shorter" shovel length
Claire T has left the meeting.
Attendee26 has joined the meeting.
Attendee27 has joined the meeting.
MathZombie: are we imagining that a hole is a hemisphere?
Frank: cylindrical?
Mr_K: (You said you could easily estimate the weight of dirt to fill your living room. How much?)
Stacy: cylinder
VoijaRisa: cylinder
Ashli: cylinder
Steve G.: Cylinder
MathZombie: oh, ok, i hadnt seen the video
Mr_K: cylinder
MathZombie: cylinder
Attendee23 has left the meeting.
Attendee24 has left the meeting.
Attendee28 has joined the meeting.
sheng: Density of dirt while in the ground and after shoveling is different (looser so lower)
Claire T: Lost my sound.
Steve G.: 1000 pounds. Too low: 50 pounds. Too high: 10,000 pounds.
sheng: [100, 500, 10000]
Frank: 400:1500:5000
VoijaRisa: [0.5, 2, 10]
Peter: 1, 100, 10000
Tricia: 100 low
Stacy: 100, 10, 1000
Attendee29 has joined the meeting.
MathZombie: low: 50, high, 10,000, guess 5000
David L: 1000lbs - 100,000lbs
Mr_K: 400 lbs to low, 5000lbs too high
VoijaRisa: I was going day
Aaron: [200lb, 1000lb, 1000000lb]
Tricia: 10000
VoijaRisa: lemme math that out
Frank: assuming they dont take any days off
Ashli: low: 365 lb high 3650 lbs (difference)
Steve G.: @Claire: Stop, then start "live" video.
Justin & Anna: about 1000 (100 low, 10000 high)
Tansel: 100 1000 10000
VoijaRisa: [150, 325, 3250]
me: ddmeyer@gmail.com
MathZombie: can you repost the links of info?
VoijaRisa: we looking to plug in any numbers? Or just writing out equations?
me: 5 feet for the regular shovel
me: 2 inches less for x-ray's shovel
me: 1 hole per day for 365 days
Claire T: @Steve G thanks--still not working though
me: According to this documenthttp://ts.nist.g​ov/ts/htdocs/230/235/wei​ ghtcart/historyof105-8.p​dfat the US NIST, the average density of dirt is 120 lbs per cubic foot.
Steve G.: @Claire. Bummer. That worked for me.
Claire T has left the meeting.
Attendee30 has joined the meeting.
MathZombie: was there any mention as to how wide the holes are? and are they as deep as a shovel/
sheng: What is the question? How much more/less dirt right?
MathZombie: sorry, i missed the video completely
MathZombie: ok, great, thanks
sheng: got it. thx :)
MK has left the meeting.
Chad has left the meeting.
Stacy: Got the volume diff, stuck on weight. Should I just estimate a weight/ft^3 for dirt or look it up?
VoijaRisa: are they also using the shovel to measure diameter? If so we need to subtract 1 inches from that as well
CalcDave: Stacy: NIST says 120 lb/ft^3
Mr_K: Do we know huw much shoerter the shovel is?
VoijaRisa: shovel is 2in shorter
Attendee31 has joined the meeting.
Stacy: argh...2 in on diameter is only 1 on radius...recalculate
Attendee32 has joined the meeting.
Peter: thanks stacy
Ashli: 120 lbs for a cubic foot of dirt? how much water is in that dirt? we're talking about the desert here, not fertilizing soil
Michael has left the meeting.
Attendee33 has joined the meeting.
Steve G.: Good point, Ashli.
Ashli: that seems way high
Mr_K: That dirt actually is really dense.
CalcDave: http://wiki.answers.com/​Q/What_is_the_density_of​_sand
CalcDave: density of sand numbers?
Mr_K: Al most claylike.
MatrixFrog: Darn, I'm coming in super late. Is someone liveblogging / real-time-summarizing this somewhere?
MathZombie: we e-mail you a picture of our work?
VoijaRisa: Do we care about significant digits?
CalcDave: Packed, dry sand seems to be: 1682 kg/m^3
CalcDave: would need to convert to our units
David L: where is your email?
me: ddmeyer@gmail.com
Frank: 120lbs/ft^3 seems like a lot haha
JovanDM has left the meeting.
Frank: that's like a person squished into 5 cereal boxes
me: http://www.mrmeyer.com/w​cydwt/live2/
MathZombie: we were pretty close dan
MatrixFrog: Cool, thanks
Attendee34 has joined the meeting.
Justin & Anna: you should have ours
Steve G.: I'm quite close to you on tons, Dan. Probably rounding differences in the calculations.
CalcDave: I have found that packed sand is ~105 lb/(ft^3) if you want to try with that instead of the 120
Mr_K: I think your weight guess for dirt in your room would be off more than the guess of volume.
Justin & Anna: @CalcDave it'll still be the same order of magnitude, though
CalcDave: true, J&A....but packed sand is almost brick-like, I'd think
MathZombie: I think i agree with mr. k
VoijaRisa: Looks like w're all within rounding error
David L: Dan, I'm close to your answer
MathZombie: especially if you look at our guesses from the beginning
VoijaRisa: Images from MathZombie and me don't seem to be working
Stacy: if the dirt weight is correct, even one day would be a significant difference.
David L: those that worked in feet versus those that worked in inches should have different answers just due to accuracy of units
Tansel has left the meeting.
Ashli: I switched to inches and then back at the end for ease of use
MathZombie: same here
Attendee35 has joined the meeting.
Aaron: I agree
Steve G.: I got 208 tons.
MathZombie: it made me think of those diff. eq. related rate problems
Attendee34 has left the meeting.
Ashli: I also went with 30lbs/ft^3
MathZombie: but could easily adapt to a geometry question
Steve G.: I'll take the shorter shovel!
VoijaRisa: I just went to feet straight off and stayed with it. *shrug*
Ashli: http://www.blurtit.com/q.html
Claire T: I converted units to decimal and got 207.92 tons
Ashli: I found a link
Attendee36 has joined the meeting.
David L: I'm at a little over 208 tons as well.
Justin & Anna: even over a day
Ashli: I also know that I can lift a cubit foot of dirt, but not 120lbs
Steve G.: Claire, I'm right with you. 207.9.
MathZombie: if it is 5000, and 10000 are still way off
Justin & Anna: David L had a high range
CalcDave has left the meeting.
MatrixFrog has left the meeting.
has joined the meeting.
Aaron: change the size of the original shovel
VoijaRisa: Have them see just how much the weight of the dirt changes things
Frank: go outside and dig dirt and compare
Frank: jk
Ashli: convince the grounds crew to let me dig a hole
Peter: how many extra shovel strokes per year
VoijaRisa: also look at the change of the radius/diameter to see just how much that cubed term in there changes thing
Justin & Anna: how much shorter would the next shovel have to be for the difference to be the same?
MathZombie: maybe mold it into a project where they build something conserving material
Steve G.: Yes, get some actual dirt and head to the science department.
Claire T: Love Justin and Anna's response
has left the meeting.
MathZombie: make a hole as tall as you are
MathZombie: each student would have a different problem
Aaron: I like J&A's more
Attendee37 has joined the meeting.
Steve G.: Zombie, that's good, except for the 5-foot tall student.
Frank: or given the actual weight and shovel height difference, find the density of dirt
MathZombie: yes steve, thats true
Aaron: I think the dirt debate needs to be resolved
David L: I honestly would have someone finishing early to help someone that has no clue. Probably not what I should be doing but it's what would happen.
Stacy: I love this problem, but we still don't have a good way to check our answer
MathZombie: this seemed to fit a textbook question more
Claire T: Liked the discussion on what value to use for density of dirt
Justin & Anna: awesome that the actual weight was much, much higher than we expected
Mr_K: Frustration was deciding whether to do it on the screen, or on paper - I made the wrong choice and had to change up half way through.
VoijaRisa: Unit conversions tend to frustrate students in low level math classes I've noticed. They complain about it till they've at least done it in Chemistry/Physics
Frank: nice pun
Aaron: "dig" hehe
Tricia: What about talking to the earth science teacher and asking them to join us
Attendee36 has left the meeting.
Mr_K: As for the actual weight being wrong - it points to how poorly we actually understand weight and density, in contrast to dan's earlier assertion.
Steve G.: Have a scale and a cubic foot of dirt already on hand?
Mr_K: I bet we would have guessed volume answers much closer.
MathZombie: i could just imagine it worded in a book showing a picture of a hole with the cylinder mapped out
Peter: i like steve G, have small amount of dirt on hand to check problem
Frank: unless u converted the final cubic feet to something else
MathZombie: it would be cool to get a cubic foot box and a trashcan
Frank: like thats 5 dump trucks or something
MathZombie: and so they get an idea as to how it would fit
Mr_K: I get your point as far student engagement.
Justin & Anna: I felt like what the video added was narrative context and impetus, rather than having to go in and pull out data as much and having to define the problem.
Justin & Anna: and the video didn't provide the answer, as your WCYDWTs often do.
MathZombie: i agree with that j and a
Attendee38 has joined the meeting.
MathZombie: i felt this was less rewarding
MathZombie: than the escalator one
Ashli: several english classes at my school read holes--this true for anyone else? possible cross-subject tye ins
Aaron: does the movie ever make another reference to some "answer"?
Justin & Anna: what did you say was cumbersome?
David L: When dealing with anything like this, an exact answer isn't very common. The holes dug wouldn't be perfect so the answer can't be perfect.
Justin & Anna: No, it makes it interesting.
Claire T: Good point David L
Mr_K: I liked this one, because it made even the teachers scratch their heads. The best part about math is when it disproves our assumptions.
Attendee39 has joined the meeting.
MathZombie: though it would be neat for that student who says it wouldnt make a difference
Justin & Anna: Gathering is part of the fun!
VoijaRisa: Why's it any worse getting info from a video worse than a word problem?
Frank: mmm i find it interesting...
Steve G.: The idea, David L, that we can't get the *exact* answer is a real-world issue to tackle.
David L: I liked that the work was displayed and though we didn't do much discussion, finding the 'error' in others work can be really powerful.
MathZombie: it's just different so the students like it more
Frank: the word problem usually gives u what u need.. in this case u asked us what we needed
MathZombie: and they can "see" it in the real world
Ashli: @david agreed
VoijaRisa: I don't think there is one aside from learning styles. Some people are auditory
Peter: they may miss it the first time around in the video so they have to generate what data they need before working through
Aaron: and I like the idea of a student seeing you who can't help but see math in the movie
David L: I'm with you Steve G. Fluctuations in the answer (to what point) are fine.
MathZombie: i like peters comment
Aaron: "thinking like a mathematician" and all
Mr_K: I donb't think it's so much the video, as that it comes out of a narrative. Most of my kids have read the book, I could have had them just revisit that passage, and still get the same engagement.
Justin & Anna: It wasn't too hard to know what info we needed here, and how to get it.
Ashli: I wonder if students would ask to see the video again
Stacy: in river problems though, the students were still not given the data explicitly. They looked at measurements and I imagine those measurements weren't given until asked for
Steve G.: My 12-year old son, watching the whole time, found the video more engaging than just a textbook word problem.
MathZombie: When you show videos like this, do your students get mad when you stop the video?
Attendee40 has joined the meeting.
MathZombie: mine absolutely hate me for it when i do that
Attendee38 has left the meeting.
Ashli: thumbs up to that
VoijaRisa: It'd be awesome to give to a sub for a day
Stacy: would you give this problem after directly teaching volume of cylinder?
Mr_K: Thumbs up on the problem - especially when you get to the variations.
David L: Not subs I've had :(
Frank: i like the whole process.. it's a real world problem in the sense that ur missing info, then u have to find it on google or some other source.. and ur not even really sure its right (120??).. and give it ur best shot.. thats how many real life problems are like
Aaron: good question, Stacy, or would this cause the students to go out and learn the volume of a cyl
Ashli: I would be interested to present this video to students the same way you presented it to us. what questions would they come up with?
VoijaRisa: Give them a guide to each one. Basically what we all Emailed you and they (hopefully) could solve it
maria has left the meeting.
David L: Dan, have you tried this DimDim with a class after hours as 'homework?'
Claire T: There's a lot of ways that you could follow this up.
Attendee39 has left the meeting.
Uli: I find the combination of unit conversion, cylinder volume and manipulation of differences a little hard. Who do you think the target audience in terms of level?
Ashli: wolfram alpha gives a good dirt-weight answer
Justin & Anna: To shift slightly from before, there's a subtle way that you had to gather info here, even though we were good at it. Sticking that same info into a paragraph "word problem" would be less interesting.
Claire T: Thanks Dan! Great working through this with everyone.
Ashli: cheers
MathZombie: thanks, i love these
Justin & Anna: The info is scattered in the video.
Frank: thanks dan!
Tricia: Thanks!!
Peter: thanks,
Steve G.: Thanks, Dan!
Justin & Anna: Thanks, Dan!
David L: thanks
Uli: It was fun
Mr_K: Thanks Dan!
Attendee41 has joined the meeting.
David L has left the meeting.
Claire T has left the meeting.
Ashli has left the meeting.
Steve G. has left the meeting.
johngolden has left the meeting.