Announcement

Collapse
No announcement yet.

3rd Grader Science - vibrating ooblik, jello, slime and other stuff

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

    My third grader has an upcoming science project. He's chosen to examine the properties of ooblik and other liquidy materials when placed on a vibrating speaker. (I'm sure you all have seen the videos of the dancing non-Newtonian fluid).

    We have a list of other materials we're going to vibrate and see what they do. So far, our list is:

    Ooblik
    Slime
    Paint
    Whipped cream
    Jello (cubed)
    Jello (using speaker cone as a mold)
    Sand
    BB's
    Corn Syrup
    Water

    I have 8 of these laying around from an old project, just waiting to be abused or burned up:

    http://www.parts-express.com/bravox-...d-sub--299-074

    We're going to video each for his "report". I doubt we'll get very high quality slo-mo, but it something does something really interesting, I might post back just for kicks.

    So, here's you're chance to offer suggestions of other goo to vibrate. It needs to be cheap and non-hazardous (no mercury, etc.)

  • #2
    Re: 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

    You forgot the water+cornstarch mix.

    Comment


    • #3
      Re: 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

      Originally posted by MGrant1957 View Post
      You forgot the water+cornstarch mix.
      That's "ooblek" - top of the list

      I'm wondering if I can get a standing wave in plaster of Paris, and let it harden. Will the wave remain? Probably not, but we might try it.

      Comment


      • #4
        Re: 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

        Fluid for viscous LSD's. ATF might work, too, but probably not as well.

        Comment


        • #5
          Re: 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

          Originally posted by chad1376 View Post

          I have 8 of these laying around from an old project, just waiting to be abused or burned up:

          http://www.parts-express.com/bravox-...d-sub--299-074
          Those are very nice drivers. I like your science project, but hate to see them get ruined. This is a nice design by our late beloved Lou:

          http://www.rob-elder.com/LouC/speake...avoxTower.html
          “I cried because I had no shoes until I met a man who had no feet”

          If we all did the things we are capable of doing, we would literally ASTOUND ourselves - Thomas A. Edison

          Some people collect stamps, Imelda Marcos collected shoes. I collect speakers.:D

          Comment


          • #6
            Re: 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

            You might wish to check this out:

            http://techtalk.parts-express.com/sh...=chaldni+plate
            DARPA Jr - 2015 InDIYana Winner - RS180-8 + RS100P-8 + ND25FA
            The Aria's - RS150-4 (or RS150-8) + XT25SC90
            The Mariposa's - TEBM65C20F-8 + ND16FA
            The Canzonetta's - RS100P-8 and ND16FA
            AudioSource AMP-100 Mods OR Pyle PAMP1000 Mods

            Comment


            • #7
              Re: 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

              I feel a little bad using the speakers, but honestly, they've been taking up my limited garage space for several years, and I'm in the process of clearing out junk I don't really need. They're far from NIB, and have broken bits of frame plastic and lots of "shelf wear". I've started to develop a real speaker project several times to re-purpose them, but always end up finding different drivers that suit my need better.

              The Chaldni plate looks really cool. I think the hardest part would be having my kid understand and explain what is going on, without it looking like I did everything. With the goo experiment, it should pretty easy to lead him to understand some concepts fluid viscosity and unit density on his own. I think this would be an awesome experiment when he's a little older.

              Comment


              • #8
                Re: 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

                A layer of plastic wrap will protect the cones without affecting anything. No biggie!

                Comment


                • #9
                  Re: 3rd Grader Science - vibrating ooblik, jello, slime and other stuff

                  OK - experiment complete. Only two speakers were lost in the cause. We tried the following materials at 15, 20, 25, 30 and 60 hz:

                  Water - As you'd expect, splashed a lot.

                  Chicken Feed - Bounced around in the cone, not too exciting.

                  Flour - Made a cool cloud of dust over the cone at 60 hz.

                  Slurpee - Kind of liquified at 60 hz

                  Slime - dollar store slime is very stiff. It only bounced around.

                  Whipped Cream - vibrations "de-foamed" the emulsion, leaving liquid cream at the end.

                  Lotion - Had some really cool standing waves on the surface.

                  Jello - 1/4 cup solid jello bounced at low frequencies, then tore itself apart into small bouncing pieces at higher frequencies.

                  Play Dough - just bounced around on the cone.

                  Biscuit Dough - Makes a great shock absorber. Bottom moved with cone, but top was nearly motionless at certain frequencies.

                  Peanut Butter - Not much until we cranked up the power. It started to flow and have standing waves - then the voice coil burned up.

                  Ooblik - Does all the cool stuff we've seen on YouTube. It's magical stuff. Acts liquid until vibrations cause it to solidify, then it does it's dance.

                  Video needs a lot of editing. It'll be OK for a class project, but not very good for "public consumption". Maybe I'll edit a super short "highlight reel.":D

                  Comment

                  Working...
                  X