#acl Narf:read,write,delete,revert,admin FacultyGroup:read,write All:read ||<25% style=""text-align:center" ">[[PiraScheme#Mechanics|Table of Fluid Mechanics]] ||<25% style=""text-align:center" ">[[StaticsOfFluids|Fluid Mechanics (2B): Statics Of Fluids]] ||<25% style=""text-align:center" "> ||<25% style=""text-align:center" ">[[Demonstrations|Lecture Demonstrations]] || == Dynamics of Fluids == ''PIRA classification 2C'' = 2C10. Flow Rate = ||<10% style=""text-align:center" ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets'''||<60% style=""text-align:center" ">'''Abstract''' || ||2C10.10 ||Torricelli's Tank ||pira200||Water streams from holes at different heights in a vertical glass tube. || ||<#dddddd>2C10.11 ||<#dddddd>Torricelli's tank ||<#dddddd> ||<#dddddd>Determine the velocity of efflux by the parabolic trajectory method or attach a manometer to the various openings. Holes of different size at the same height show independence of diameter. || ||<#dddddd>2C10.12 ||<#dddddd>Mariotte's Flask ||<#dddddd> ||<#dddddd>A flask with three holes drilled in the side at different heights is filled with water and closed with a stopper fitted with an open glass tube. The flow from the holes changes as the tube is moved up and down. || ||2C10.20 ||Pressure Drop Along a Line || ||Open tubes along a glass tube show pressure drop along a line. || ||<#dddddd>2C10.22 ||<#dddddd>Viscosity ||<#dddddd> ||<#dddddd>Run a water pipe around the lecture hall with pressure gauges at the top and bottom of each side. Show the difference between static and kinetic pressure. || ||2C10.26 ||Syringe Water Velocity || ||Squirt water out of a syringe. The water moves faster through the constriction. || <> = 2C20. Forces in Moving Fluids = ||<10% style=""text-align:center" ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets'''||<60% style=""text-align:center" ">'''Abstract''' || ||2C20.05 ||Hydrodynamic Attraction || ||Move a small sphere in water and another in close proximity will move due to hydrodynamic attraction. || ||2C20.15a ||Venturi Tubes ||pira200||A series of manometers measures pressure of flowing air at points along a restricted tube. || ||2C20.15b ||Big Venturi Tubes || ||This version is bigger and uses ping pong balls as floats. || ||2C20.20 ||Atomizer || ||A jet of air is blown across one end of a "U" tube. || ||2C20.25? ||Pitot Tube ?(PIRA LOCATION)? || ||?A pitot tube is connected to a water manometer and the air stream velocity is varied. Graphics. || ||2C20.30 ||Bernoulli Ball || ||A ball is suspended in an upward jet of air. || ||<#dddddd>2C20.33 ||<#dddddd>Oscillating Bernoulli Balls ||<#dddddd> ||<#dddddd>An air jet keeps two balls at the high edge of semicircular tracks. || ||2C20.35 ||Ball and Cup || ||Air blowing out an inverted funnel will hold up a ball. || ||<#dddddd>2C20.36 ||<#dddddd>Ball in a Water Stream ||<#dddddd> ||<#dddddd>Drill out a clear plexiglass tube to different diameters, connect water, and show that the ball sits at the change of diameter despite being tipped upside down. || ||<#dddddd>2C20.40 ||<#dddddd>Lifting Plate ||<#dddddd> ||<#dddddd>Air blows radially out between two plates. This allows them to support masses. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000071000002000176000001&idtype=cvips&doi=10.1119/1.1524162&prog=normal|AJP 71(2), 176]]. || ||2C20.41 ||Lifting Plate || ||A pin is stuck through a card and it is inserted into the hole in a wooden spool. Blow in the spool and the card sticks. This can be scaled up if higher air pressure is available. Blow into a spool and lift a paper with a pin stuck through into the hole in the spool. || ||<#dddddd>2C20.43 ||<#dddddd>Spin out the Air ||<#dddddd> ||<#dddddd>When a disc hanging from a spring scale is mounted just above an identical spinning disc, the spring scale will show an increase in force. || ||2C20.44 ||Blow Coin into Cup || ||Place a coin in the table a few inches in front of a coffee cup, give a puff, and the coin jumps into the cup. || ||2C20.45 ||Attracting Sheets || ||Blow an air stream between two parallel cards on bifilar suspensions. Also try with two large balls. || ||<#dddddd>2C20.46 ||<#dddddd>Sticking Paper Flap ||<#dddddd> ||<#dddddd>A stream of air blown between a paper and a surface will cause the paper to cling to the surface. || ||<#dddddd>2C20.50 ||<#dddddd>Airplane Wing ||<#dddddd> ||<#dddddd>A balanced model airplane with big wings shows lift when a stream of air is directed onto it. Pressure censors show the Bernoulli effect. || ||2C20.51 ||Paper Lift || ||Hold one edge of a sheet of paper horizontally and let the rest hang. Blow across it and watch the sheet rise. || ||<#dddddd>2C20.52 ||<#dddddd>Airplane Wing ||<#dddddd> ||<#dddddd>Connect a slant manometer to holes on the top and bottom of an airfoil. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-303]]. || ||<#dddddd>2C20.53 ||<#dddddd>Raise the Roof ||<#dddddd> ||<#dddddd>Air blown over a model house raises the roof. || ||<#dddddd>2C20.54 ||<#dddddd>Paper Dirigible ||<#dddddd> ||<#dddddd>A paper loop in an air stream and a falling card. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000044000008000780000001&idtype=cvips&doi=10.1119/1.10313&prog=normal|AJP 44(8), 780]]. || ||<#dddddd>2C20.54 ||<#dddddd>Rayleigh's Disk ||<#dddddd> ||<#dddddd>A lightweight disk turns perpendicular to the air flow. || ||2C20.55 ||Boomerang || ||An article explaining boomerang flight along with directions for throwing and building one. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHTEAH000028000003000142000001&idtype=cvips&doi=10.1119/1.2342973&prog=normal|TPT 28(3), 142]]. || ||<#dddddd>2C20.56 ||<#dddddd>Fly Wing Mechanism ||<#dddddd> ||<#dddddd>How to build a working model of Pringle's fly wing mechanism. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000045000003000303000001&idtype=cvips&doi=10.1119/1.10992&prog=normal|AJP 45(3), 303]]. || ||<#dddddd>2C20.57 ||<#dddddd>Flying Umbrella ||<#dddddd> ||<#dddddd>A motor mounted inside an umbrella is attached to a centrifugal fan mounted above the umbrella pulling air through a hole in the top so it flows down over the side. Develops a few oz of lift. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000029000007000459000001&idtype=cvips&doi=10.1119/1.1986011&prog=normal|AJP 29(7), 459]]. || ||2C20.58 ||Dropping Wing Sections || ||A folded index card, a paper pyramid, or a paper cone are stable when dropped apex down. || ||2C20.59 ||[[Styrofoam_Airplane]] || ||A model airplane is used to demonstrate the principles of lift and air drag. It can also be used in the discussion of airfoils. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000055000001000050000001&idtype=cvips&doi=10.1119/1.14960&prog=normal|AJP 55(1), 50]], [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHTEAH000028000002000084000001&idtype=cvips&doi=10.1119/1.2342945&prog=normal|TPT 28(2), 84]], and [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHTEAH000028000002000078000001&idtype=cvips&doi=10.1119/1.2342944&prog=normal|TPT 28(2), 78]]. || ||2C20.60 ||Curve Ball || ||Throw a 3" polystyrene ball with a "V" shaped launcher lined with emery cloth. || ||<#dddddd>2C20.61 ||<#dddddd>Spinning Ball ||<#dddddd> ||<#dddddd>Direct a high speed stream of air at a ball spinning on a rotating rod free to pivot perpendicular to the air stream. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000076000002000119000001&idtype=cvips&doi=10.1119/1.2805242&prog=normal|AJP 76(2), 119]]. || ||2C20.70 ||Mailing Tube || ||Cloth webbing wrapped around a mailing tube is jerked out causing the tube to spin through a loop the loop motion. || ||2C20.70 ||Bjerknes' Tube || ||Wrap three feet of cloth tape around the middle of a mailing tube and give a jerk. The tube does a loop-the-loop. || ||2C20.72 ||Bernoulli Cups || ||Glue the rims of two styrofoam cups together and launch by letting them roll off the fingers while throwing. Four glued together works better. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000047000002000200000001&idtype=cvips&doi=10.1119/1.11879&prog=normal|AJP 47(2),200]]. || ||2C20.75 ||Bernoulli Pen Barrel || ||Remove the filler from a ball point pen, place under your thumbs at the edge of the lecture bench. Pop the barrel out from under your thumbs giving it lots of spin. || ||<#dddddd>2C20.80 ||<#dddddd>Flettner rotator ||<#dddddd> ||<#dddddd>Direct an airstream at a light car with a large rotating stryofoam cylinder. The car will move at right angles to the airstream. Could be used with the air track. || ||2C20.85 ||Magnus Effect || ||Construction details for a very light cylinder and a method of spinning and releasing. Diagram. ALSO - Vertical motorized cylinder on a cart. || ||2C20.95 ||Frisbee || ||An analysis of how a Frisbee works. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHTEAH000021000005000325000001&idtype=cvips&doi=10.1119/1.2341303&prog=normal|TPT 21(5), 325]]. || <> = 2C30. Viscosity = ||<10% style=""text-align:center" ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets'''||<60% style=""text-align:center" ">'''Abstract''' || ||<#dddddd>2C30.10 ||<#dddddd>Viscosity Disc ||<#dddddd> ||<#dddddd>A horizontal disc is hung on a single thread and a second disc is spun below it, causing deflection. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-62]]. || ||<#dddddd>2C30.11 ||<#dddddd>Viscosity Disc ||<#dddddd> ||<#dddddd>A disc is spun between two parallel plates of a platform balance and the deflection is noted. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-61]]. || ||<#dddddd>2C30.12 ||<#dddddd>Viscosity Disc ||<#dddddd> ||<#dddddd>A metal sheet and a disc are mounted parallel in a container of fluid. Rotate the disc and observe the displacement of the sheet by projection. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-56]]. || ||2C30.13 ||Viscosity - Viscosimeter || ||Coaxial cylinders are separated by a fluid. As the outer cylinder is rotated, the drag induced motion of the inner cylinder is observed by optical lever magnification. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-55]]. || ||<#dddddd>2C30.15 ||<#dddddd>Pulling an Aluminum Plate ||<#dddddd> ||<#dddddd>Use a string and pulley to a mass to pull an aluminum plate out of a viscous fluid ( GE Silicone Fluid, SF-96/10,000). || ||<#dddddd>2C30.20 ||<#dddddd>Viscocity in Capillary ||<#dddddd> ||<#dddddd>A Mariotte flask with a capillary out on the bottom permits varying the pressure at cm of water. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000033000010000848000001&idtype=cvips&doi=10.1119/1.1970999&prog=normal|AJP 33(10),848]]. || ||2C30.25 ||Oil Viscosity || ||Quickly invert tubes of oil and watch the bubbles rise to the top. Air bubbles rise at different speeds in different fluids. || ||2C30.30 ||Temperature and Viscosity || ||Tubes filled with motor oil and silicone oil are inverted at room temperature and after cooling with dry ice/alcohol. Or, use castor oil from 5 to 50 C the viscosity goes down by a factor of 15. || ||2C30.45 ||Terminal Velocity - Drop Balls || ||Precision ball in a precision tube. || ||2C30.50 1C10.51 ||[[GlycerinViscosity|Terminal Velocity With Water, Glycerin, & Marbles]] || ||Two identical marbles are dropped simultaneously into separate graduated cylinders, one filled with glycerine and the other with water. The marble dropped in glycerine will quickly reach terminal velocity, obtaining a slow and constant velocity that can be measured. || ||<#dddddd>2C30.52 ||<#dddddd>Terminal Velocity - Diameter ||<#dddddd> ||<#dddddd>Three steel balls of different diameters are sealed in a 4' tube. Illuminate with a lamp at the bottom. || ||<#dddddd>2C30.53 ||<#dddddd>Terminal Velocity - Specific Gravity ||<#dddddd> ||<#dddddd>Four balls of the same diameter with carefully adjusted specific gravity are dropped in glycerine. || ||<#dddddd>2C30.55 ||<#dddddd>Terminal Velocity - Styrofoam Ball ||<#dddddd> ||<#dddddd>A 2" dia. styrofoam ball reaches terminal velocity in 5.5m. Use a stop frame and take data. || ||<#dddddd>2C30.56 ||<#dddddd>Terminal Velocity - Dylite Beads ||<#dddddd> ||<#dddddd>Dylite beads reach terminal velocity quickly in water, and when expanded by heating in boiling water, are also useful in air. || ||2C30.65 ||Terminal Velocity coffee Filters || ||Drop a coffee filter and it descends with low terminal velocity. Crumple one and drop it. || ||2C30.65 ||Air Friction || ||Drop crumpled and flat sheets of paper. || <> = 2C40. Turbulent and Streamline Flow = ||<10% style=""text-align:center" ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets'''||<60% style=""text-align:center" ">'''Abstract''' || ||<#dddddd>2C40.10 ||<#dddddd>Streamline Flow ||<#dddddd> ||<#dddddd>The Cenco streamline gravity flow apparatus. A commercial apparatus to show flow around objects in projection cells. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-306]]. || ||<#dddddd>2C40.11 ||<#dddddd>Streamline Flow ||<#dddddd> ||<#dddddd>A streamline flow apparatus that uses several potassium permanganate tracers. || ||<#dddddd>2C40.14 ||<#dddddd>Streamlines on the Overhead ||<#dddddd> ||<#dddddd>Flow is shown between two glass plates from a source point to a collection point. Dilute NaOH passes a ring of phenophthalein beads around the source generating colored trails. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000037000009000868000001&idtype=cvips&doi=10.1119/1.1975909&prog=normal|AJP 37(9), 868]]. || ||<#dddddd>2C40.14 ||<#dddddd>Inverse Square Law Patterns ||<#dddddd> ||<#dddddd>Inverse-square-law field patterns are illustrated by dyed streamlines of water flowing between two glass plates. Construction details in appendix, p. 620. || ||2C40.16 ||Dry Ice Fog || ||Some dry ice in a flask of warm water will produce a jet of fog that can be used with a fan to show the effects of various objects on air flow. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-307]]. || ||<#dddddd>2C40.17 ||<#dddddd>Streamline Design ||<#dddddd> ||<#dddddd>The effect of moving air on a disc and streamlined object of the same cross section is demonstrated. || ||<#dddddd>2C40.18 ||<#dddddd>Fluid Mappers ||<#dddddd> ||<#dddddd>Several types of fluid mappers. Pictures and diagrams. Construction details in appendix, p. 614. || ||2C40.20 ||Streamline Flow - Blow Out Candle || ||Place a lighted candle on one side of a beaker and blow on the other side to put out the candle. || ||2C40.21 ||Streamline Flow - Blow Out Candle || ||A technique to blow a card over using upward curling streamlines. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-309]]. || ||<#dddddd>2C40.25 ||<#dddddd>Poiseuille Flow ||<#dddddd> ||<#dddddd>Colored glycerine is placed on top of clear glycerine in a square cross sectioned tube and a stopcock is opened at the bottom to adjust flow. Or, watch the interface between clear oil on the bottom of a glass tube and colored oil on top as oil is drawn off the bottom. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-310]]. || ||<#dddddd>2C40.30 ||<#dddddd>Vena Contracta ||<#dddddd> ||<#dddddd>As a liquid emerges vertically downward, its jet contracts in diameter. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-254]]. || ||<#dddddd>2C40.50 ||<#dddddd>Laminar and Turbulent Flow ||<#dddddd> ||<#dddddd>The velocity of a stream of ink is varied as it is introduced into a tube of smoothly flowing water. || ||2C40.51 ||Reynold's number || ||A tapered nozzle introduces tracer fluid into a tube at the bottom of a reservoir. || ||<#dddddd>2C40.51 ||<#dddddd>Reynold's Number ||<#dddddd> ||<#dddddd>An apparatus for varying the flow in a tube and introducing a tracer into the flow. Different fluids can be used. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000028000002000165000001&idtype=cvips&doi=10.1119/1.1935087&prog=normal|AJP 28(2), 165]]. || ||<#dddddd>2C40.53 ||<#dddddd>Reynolds' Number ||<#dddddd> ||<#dddddd>The flow rate in a long thin brass tube is adjusted until spitting starts. Flow rate is determined by collecting water for a given time. This lets one determine || ||2C40.60 ||Laminar and Turbulent Flow || ||Shadow project rising warm air flowing around objects. || ||<#dddddd>2C40.61 ||<#dddddd>Streamline vs. Turbulent Flow ||<#dddddd> ||<#dddddd>Drop a ball into a viscous liquid or water. Shadow project a hot iron ball in slowly or rapidly moving air. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-311]]. || ||<#dddddd>2C40.63 ||<#dddddd>Laminar and Turbulent Flow ||<#dddddd> ||<#dddddd>The Krebs apparatus is used to show flow of water around objects. || ||<#dddddd>2C40.73 ||<#dddddd>Stero Shadowgraph ||<#dddddd> ||<#dddddd>On viewing fluid flow with stereo shadow-graphs. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000044000010000981000001&idtype=cvips&doi=10.1119/1.10245&prog=normal|AJP 44(10), 981]]. || ||<#dddddd>2C40.90 ||<#dddddd>Rayleigh-Taylor Instability in Prell ||<#dddddd> ||<#dddddd>A air bubble rising in a tube of Prell shampoo demonstrates Rayleigh-Taylor instability. Other examples are given. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000053000005000484000001&idtype=cvips&doi=10.1119/1.14206&prog=normal|AJP 53(5), 484]]. || <> = 2C50. Vortices = ||<10% style=""text-align:center" ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets'''||<60% style=""text-align:center" ">'''Abstract''' || ||2C50.10 ||Smoke Rings || ||Tap smoke rings out of a box with a rubber diaphragm on one end and a hole in the other. || ||<#dddddd>2C50.11 ||<#dddddd>Smoke Rings with LP Gas ||<#dddddd> ||<#dddddd>A rubber sheet at the back of a large wooden box is struck with a hammer to produce smoke rings capable of knocking over a plate. Fuming HCL and conc. ammonia produce the smoke. || ||2C50.12 ||Vortex Box || ||A 24 inch square, 8 inch deep vortex box with a 4 inch diameter hole. || ||2C50.15 ||Vortex Cannon || ||Use a large barrel to generate a smoke ring. Blow out a candle with the vortex. Animation. || ||<#dddddd>2C50.20 ||<#dddddd>Liquid Vortices ||<#dddddd> ||<#dddddd>A drop of inky water is allowed to form on a medicine dropper 1" above a beaker of water. This height is critical. The vortex will rebound if the beaker is less than 4" deep. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-253]]. || ||<#dddddd>2C50.22 ||<#dddddd>Semicircular Vortex in Water ||<#dddddd> ||<#dddddd>A skill demonstration. Use a small paddle to form vortices in a small dish on the overhead projector. || ||2C50.23 ||Detergent Vortex || ||A few drops of detergent in a jar of water are shaken and given a twist to form a vortex lasting several seconds. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHTEAH000028000007000494000001&idtype=cvips&doi=10.1119/1.2343124&prog=normal|TPT 28(7), 494]]. || ||<#dddddd>2C50.25 ||<#dddddd>Whirlpool ||<#dddddd> ||<#dddddd>Water is introduced tangentially into a cylinder with a hole in the bottom. || ||2C50.30 ||Tornado Vortex || ||Couple two soft drink bottles with the commercial tornado tube coupler and spin the top bottle so the water forms a vortex as it drains into the bottom bottle. || ||2C50.35 ||Fire Tornado || ||A rotating cylinder of copper mesh surrounds a dish with burning material in it. The air flow due to the spinning mesh causes the flames to take on a signature tornado shape. || ||2C50.35 ||Paraboloids and Vortices || ||A transparent cylinder is rotated at speeds up to 1000 RPM. See [[http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=AJPIAS000037000009000864000001&idtype=cvips&doi=10.1119/1.1975907&prog=normal|AJP 37(9), 864]]. || ||<#dddddd>2C50.40 ||<#dddddd>Growing a Large Drop ||<#dddddd> ||<#dddddd>A vortex is formed in an air stream allowing one to form a large water drop. || <> = 2C60. Non Newtonian Fluids = ||<10% style=""text-align:center" ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets'''||<60% style=""text-align:center" ">'''Abstract''' || ||<#dddddd>2C60.10 ||<#dddddd>Fluidization ||<#dddddd> ||<#dddddd>A bed of silica powder acts like a fluid when air is forced through it. Diagram. || ||2C60.20 ||Rising Stones || ||A ping pong ball in the middle of a beaker of beans will rise when the beaker is shaken. Rising of rocks in the spring is the same as the sifting of fine particles to the bottom of a cereal box. || ||<#dddddd>2C60.22 ||<#dddddd>Beans ||<#dddddd> ||<#dddddd>The size of an aluminum ball determines whether it goes up or down in a shaking bowl of beans. || ||2C60.30 ||Cornstarch || ||Add water to cornstarch until it is goo. Pour it, throw it, punch it. || ||2C60.32 ||[[CornstarchSpeaker|Cornstarch on Speaker]] || ||Cover a speaker cone in the cornstarch suspension and turn it on. || ||<#dddddd>2C60.35 ||<#dddddd>Slime Ball ||<#dddddd> ||<#dddddd>A commercial product "Slime" flows like a liquid under normal conditions but bounces on impact. || ||<#dddddd>2C60.50 ||<#dddddd>Fluids vs. Solids ||<#dddddd> ||<#dddddd>Asphalt splinters when smashed but flows gradually, sand flows when poured but remains in a conical pile. See [[http://physicslearning.colorado.edu/PIRA/Sutton/PARTI.pdf#pagemode=none&page=1|Sutton M-253]]. || ||<#dddddd>2C60.55 ||<#dddddd>Ketchup Uzi ||<#dddddd> ||<#dddddd>Fill a super soaker with ketchup. Shoot it across the room and it blobs on the wall. || [[Demonstrations]] [[Instructional|Home]]