DCS # |
Demonstration |
Abstract/Description |
1R10.10 |
Stretching a Spring |
Add masses to a pan balance and measure the deflection
with a cathetometer. Examining the force-displacement curve at small extensions. |
1R10.10 |
Hooke's law (The Big Spring) |
Add 1, 2, or 5 Kg weights to a large spring, Examining the force-displacement
markt in Newtons. |
|
1R10.25 |
Pull on a Horizontal Spring |
Pull on a horizontal spring with a spring scale. |
1R10.30 |
Springs in Series and Parallel |
Pull on a spring, springs in series, and springs
in parallel with a spring scale. Compare the force required to stretch
each case 60 cm. |
DCS # |
Demonstration |
Abstract/Description |
1R20.10 |
Breaking Wire |
Add weights to wire that is attached to the ceiling
until the wire breaks. Insert a large spring scale if one wishes. |
1R20.11 |
Elastic Limits |
Stretch springs of copper and brass. The copper
spring remains extended. |
1R20.12 |
Breaking Wire Support |
Drill a hole axially up a 1/4" eye hook and solder
the wire in. |
1R20.15 |
Young's Modulus |
Hang weights from a wire that runs the lenth of the benches. Add 1/2
kg masses to the copper wire and show that the Stretched deflection goes
back when the mass is removed. Use either laser and mirror optical lever
to display the deflection or a arrow on the pulley. Add a lot of mass to
show the Elastic Limit. |
1R20.18 |
Poisson's Ratio |
A rubber hose is stretched to show lateral contraction
with increasing length. |
1R20.20 |
Bending or Sagging Board |
Ten lbs. is hung from the center of a meter stick
supported at the ends. Orient the meter stick on edge and then on the flat.
Place the ends of a thin board on blocks, then add mass to the center. |
1R20.20 |
Beams Under Stress |
A rectangular cross section bar is loaded in
the middle while resting on narrow and broad faces. Hang weights at the
ends of extended beams. Use beams of different lengths and cross sections.
Hang weights at the ends of extended beams. Use beams of different lengths
and cross sections. |
1R20.27 |
Aluminum/Steel Elasticity Paradox |
Copper and brass rods sag different amounts under
their own weight but steel and aluminum do not. |
1R20.31 |
Stretch a Hole |
Holes arranged circle in a rubber sheet deform
into an ellipse when stretched. |
1R20.32 |
Deformation Under Stress |
A pattern is painted on a sheet of rubber and
deformed by pulling on opposite sides. |
1R20.xx |
Strain Gauge |
An Aluminum driven Pendulum is connected to a Strain Gauge to mesure
the strain of the pendulum when it is driven hard. |
1R20.38 |
Stress on a Brass Ring |
A strain gauge bridge is used to measure the
forces required to deform a brass ring. Diagram. Construction details. |
1R20.39 |
Squeeze the Bottle,Cartesian Diver |
A filled whisky flask with a stopper and a small test tube in side
and upside down with air traped within. Squeeze the bottle and watch the
Diver, dive and rise. |
1R20.60 |
Bologna Bottle |
Pound a nail with a Bologna bottle, then add
a carborundum crystal to shatter the bottle. |
1R20.70 |
Prince Rupert's Drops |
Drops of glass cooled quickly can be hit with
a hammer but shatter when the tip is broken off. |
DCS # |
Demonstration |
Abstract/Description |
1R30.10 |
Shear Pages of a Book |
Use a very thick book to demonstrate shear. |
1R30.11 |
Shear Cards |
Use a tall stacks of cards. |
1R30.20 |
Meterial Shearing |
Push on the top of a large foam block or use
a large sponge or use a rectangular block of rubber to show shear of different
materials. |
1R30.30 |
Spring Cube |
A 3x3x3 cube of 27 cork balls is held together
with springs. |
1R30.31 |
Plywood Sheets |
A stack of plywood sheets with springs at the
corners is used to show shear, torsion, bending, etc. |
1R30.35 |
Shear and Stress Modulus |
Unsophisticated apparatus for measuring elastic
constants of a thin flexible strip and rod. |
1R30.40 |
Modulus of Rigidity |
A rod is twisted by a mass hanging off the edge
of a wheel. |
1R30.40 |
Bending and Twisting |
Wind a copper strip around a rod and then remove
the rod and pull the strip straight to show twisting. |
1R30.40 |
Torsion Rod |
Rods of various materials and diameters are twisted
in a torsion lathe. |
1R30.45 |
Shear and Twist in Screw Dislocation |
Rule a thick walled vacuum tube with a grid,
slit lengthwise, and dislocate one unit. |
1R30.xx |
Train on a Bicycle Wheel |
An "O"- Scale train is placed on a horizontal bicycle wheel that is
free to rotate. When the train is running, one can let the train go around
the track or have it stand still will the track is rotating underneath. |
1R30.xx |
Wheel and Axle I |
A large mid-evil looking wheel on an axle. A large lead ball on a rop
is wond up on the axle and the wheel free to rotate. |
|
|
|
DCS # |
Demonstration |
Abstract/Description |
1R40.10 |
Bouncing Ball |
Drop balls of different material on to a tool
steel plate. Loss of mechanical energy in the coefficient of restitution.
Drop balls on a glass plate. Balls of various materials are bounced off
plates of various materials. |
1R40.10 |
Coefficient of Restitution |
Drop glass, steel, rubber, brass, and lead balls
onto a steel plate. |
1R40.11 |
Coefficient of Restitution |
Drop a small ball bearing on a concave lens. |
1R40.12 |
Coefficient of Restitution |
Rubber balls of differing elasticity and silly
putty are dropped in a tube onto a steel surface. |
1R40.13 |
Coeffficient of restitution in Baseballs |
Analysis leading to a prediction of up to 15
foot difference in long fly balls due to variation in coefficient of restitution. |
1R40.30 |
Happy and Sad Balls |
One bounce and the other doesn't. |
DCS # |
Demonstration |
Abstract/Description |
1R50.10 |
Solid Shapes |
How to make solid tetrahedrons and octahedrons. |
1R50.15 |
Solid Models |
Styrofoam balls and steel ball bearings are used
to make crystal models. |
1R50.16a |
Lattice Models |
Show model of Body Centered Cubic (BCC) |
1R50.16b |
Lattice Models |
Show model of Face Centered Cubic (FCC) |
1R50.16c |
Lattice Models |
Show model of Hexagonal Close Packed (HCP) |
1R50.16d |
Lattice Models |
Show model of Miller Indices |
1R50.18 |
Elastic Crystal Models |
Crystal models are built with a combination of
compression and tension springs. |
1R50.20 |
Crystal Lattice Models |
Show model of Calcite |
1R50.20 |
Crystal Lattice Models |
Show model of Carbon Dioxide |
1R50.20 |
Crystal Lattice Models |
Show model of Copper |
1R50.20 |
Crystal Lattice Models |
Show model of Diamond |
1R50.20 |
Crystal Lattice Models |
Show model of Germanium |
1R50.20 |
Crystal Lattice Models |
Show model of Graphite I |
1R50.20 |
Crystal Lattice Models |
Show model of Graphite II |
1R50.20 |
Crystal Lattice Models |
Show model of Magnesium |
1R50.20 |
Crystal Lattice Models |
Show model of "N" Germanium |
1R50.20 |
Crystal Lattice Models |
Show model of "P" Germanium |
1R50.20 |
Crystal Lattice Models |
Show model of Silicone |
1R50.20 |
Crystal Lattice Models |
Show model of Sodium Chloride |
1R50.20 |
Crystal Lattice Models |
Show model of YiBCO |
1R50.20 |
Crystal Lattice Models |
Show model of |
1R50.20 |
Crystal Lattice Models |
Show model of |
1R50.22 |
Tennis Ball Crystals |
Old tennis balls stacked together to give two
close packed crystals. |
1R50.30 |
Crystal Structure |
Show natural crystals of salt, quartz, and other
minerals, and lantern slides of snow crystals. |
1R50.31 |
Crystal Growth in a Film |
Crystal growth on a freezing soap film is observed
through crossed Polaroids |
1R50.31 |
Ice Nuclei |
Large ice crystals form on the surface of a supercooled
saturated sugar solution. |
1R50.32 |
Make Tin Crystal |
Pour pure tin into a Pyrex mold, other steps. |
1R50.40 |
Stacking Fault Model |
A closest packing spheres model that demonstrates
a fault going from fcc to hcp. |
1R50.40 |
Crystal Faults |
One layer of small ball bearings between two
Lucite sides. |
1R50.45 |
Crushing Salt |
A large salt crystal is crushed in a "c" clamp. |