fw: PropertiesOfMatter

PIRA #

Demonstration Name

Abstract

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 marked 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.

PIRA #

Demonstration Name

Abstract

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 length 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 measure 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 whiskey flask with a stopper and a small test tube in side and upside down with air trapped 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.

PIRA #

Demonstration Name

Abstract

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

Materiel 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 rope is wound up on the axle and the wheel free to rotate.

PIRA #

Demonstration Name

Abstract

1R40.10

[:MEEquipmentList: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

[:HappySad:Happy and Sad Balls]

One bounce and the other doesn't.

PIRA #

Demonstration Name

Abstract