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Archimedes Principle Demonstration
Archimedes Principle Demonstration
14703

Demonstrates the principle of Archimedes. Consists of two pieces: cylinder and close fitting bucket. All brass construction. 50mm long.
Demonstrates the principle of Archimedes. Consists of two pieces: cylinder and close fitting bucket. All brass construction. 50mm long.

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$13.50 Each
Ball and Card
Ball and Card
11736

Newton's Second Law of Motion. Demonstrates inertia.
Newton's Second Law of Motion. Demonstrates inertia.

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$10.95 Each
Ball and Ring
Ball and Ring
11737

Demonstrates expansion of metals with heat.
Demonstrates expansion of metals with heat.

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$13.50 Each
Bar and Gauge
Bar and Gauge
14699

Illustrates linear and spherical expansion by heating and contraction by cooling. Mild steel bar 110x12.5mm, length x diameter. Mounted on a rod with wooden handle and a brass gauge 150x38mm with a cutout mounted on a separate wooden handle which just admits the bar lengthways and a hole into which the bar passes endways when cold.
Illustrates linear and spherical expansion by heating and contraction by cooling. Mild steel bar 110x12.5mm, length x diameter. Mounted on a rod with wooden handle and a brass gauge 150x38mm with a cutout mounted on a separate wooden handle which just admits the bar lengthways and a hole into which the bar passes endways when cold.

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$10.95 Each
Bench Mounting Adjustable Pulley
Bench Mounting Adjustable Pulley
16870

Strong all metal construction, can be mounted on a table up to 2" (50mm) thick. Aluminum Pulley, 1.125" (300m) diameter, mounted on a vertically height adjustable bracket, which can slide up and down, and can be tightened at any point, from being parallel to the clamping surface, up to 2" (50mm) higher to the clamping surface.
Strong all metal construction, can be mounted on a table up to 2" (50mm) thick. Aluminum Pulley, 1.125" (300m) diameter, mounted on a vertically height adjustable bracket, which can slide up and down, and can be tightened at any point, from being parallel to the clamping surface, up to 2" (50mm) higher to the clamping surface.

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$10.50 Each
Convection Tube
Convection Tube
15880

To demonstrate convection of heat in liquids. Rectangular glass tube 200 x 150mm sides and 22mm in diameter with a built in funnel for easy pouring in of the liquid. Made from Borosilicate Glass. Instructions included.
To demonstrate convection of heat in liquids. Rectangular glass tube 200 x 150mm sides and 22mm in diameter with a built in funnel for easy pouring in of the liquid. Made from Borosilicate Glass. Instructions included.

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$14.95 Each
Cosmic Energy Kinetic Scuplture
Cosmic Energy Kinetic Scuplture
12932

Battery charged electro-magnetic mobile with perpetually moving forms. 9 1/4" high. One 9V battery required.
Battery charged electro-magnetic mobile with perpetually moving forms. 9 1/4" high. One 9V battery required.

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$12.95 Each
Density Cylinders - Set of 4
Density Cylinders - Set of 4
14705

Aluminum, brass, copper, and steel. 50mm x 12.5 mm.
Aluminum, brass, copper, and steel. 50mm x 12.5 mm.

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$11.50 Set
Elasticity of Gases Kit
Elasticity of Gases Kit
15228

Serves to demonstrate Boyle's Law. Shows what happens when gases are subjected to increased pressure. The plastic syringe, with solid wood base and platen, is constructed so that the calibrations denoting interior volume read right side up. As masses of bricks, books, or other heavy objects are increased, the gas in the syringe is compressed to smaller and smaller volume. The kit includes: 1 Syringe Cylinder w/ Cap, 1 Syringe Piston, 1 Base, 1 Platen.
Serves to demonstrate Boyle's Law. Shows what happens when gases are subjected to increased pressure. The plastic syringe, with solid wood base and platen, is constructed so that the calibrations denoting interior volume read right side up. As masses of bricks, books, or other heavy objects are increased, the gas in the syringe is compressed to smaller and smaller volume. The kit includes: 1 Syringe Cylinder w/ Cap, 1 Syringe Piston, 1 Base, 1 Platen.

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$12.95 Each
Friction Blocks and Surface Set
Friction Blocks and Surface Set
15878

For introducing the concept that friction depends on the nature and smoothness of materials. The kit consists of three wooden blocks, L x W, 100mm x 70mm, with hooks. One with a highly polished side, second with a sandpaper side and third with an aluminum side. Complete with a polished wooden base about, L x W, 355mm x 70mm. Instructions included.
For introducing the concept that friction depends on the nature and smoothness of materials. The kit consists of three wooden blocks, L x W, 100mm x 70mm, with hooks. One with a highly polished side, second with a sandpaper side and third with an aluminum side. Complete with a polished wooden base about, L x W, 355mm x 70mm. Instructions included.

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$11.50 Each
Gas Convection Apparatus
Gas Convection Apparatus
14698

Metal construction. With sliding plate glass front. Two glass chimneys. Candle holder is mounted in the box.
Metal construction. With sliding plate glass front. Two glass chimneys. Candle holder is mounted in the box.

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$24.50 Each
Gyroscope
Gyroscope
11735

6 cm in diameter. Supplied with supported base with socket at top end for holding the gyroscope and demonstrating various principles.
6 cm in diameter. Supplied with supported base with socket at top end for holding the gyroscope and demonstrating various principles.

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$16.70 Each
Hooke's Law Apparatus
Hooke's Law Apparatus
15881

For demonstrating Hooke's Law and for studying simple harmonic motion of vibrating weight suspended from spring and potential energy. It consists of a heavy base with an adjustable mirror millimeter scale, a spiral spring with indicator and weight hanger. Complete with four 50g slotted weights. Instructions included.
For demonstrating Hooke's Law and for studying simple harmonic motion of vibrating weight suspended from spring and potential energy. It consists of a heavy base with an adjustable mirror millimeter scale, a spiral spring with indicator and weight hanger. Complete with four 50g slotted weights. Instructions included.

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$21.95 Each
Inertia Demonstrator
Inertia Demonstrator
16963

This robustly constructed inertia demonstrator works reliably every time and is a great improvement on traditional versions of this classic experiment. A steel ball rests on a thin metal card on top of a pillar, and a spring-loaded catch is mounted next to the pillar. When the catch is released, a piston strikes the edge of the metal card sharply. The card flies out from under the ball, which remains in place on top of the pillar due to its large inertial mass. The card is tethered to the aluminum base for easy recovery after the experiment.
This robustly constructed inertia demonstrator works reliably every time and is a great improvement on traditional versions of this classic experiment. A steel ball rests on a thin metal card on top of a pillar, and a spring-loaded catch is mounted next to the pillar. When the catch is released, a piston strikes the edge of the metal card sharply. The card flies out from under the ball, which remains in place on top of the pillar due to its large inertial mass. The card is tethered to the aluminum base for easy recovery after the experiment.

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$18.95 Each
Spouting Cylinder
Spouting Cylinder
14707

Huge, metal construction. Baked shoving hammertone finish. Shows that pressure of a liquid depends on the depth/height.
Huge, metal construction. Baked shoving hammertone finish. Shows that pressure of a liquid depends on the depth/height.

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$20.50 Each
The Spillnot
The Spillnot
16962

The design of the Spillnot uses the principles of Newtonian physics to keep the liquid in the container. The flexible handle and location of the suspension point above the center of the tray ensure that the forces on the liquid are always directed toward the supporting tray, even when the tray is in motion. Sideways forces usually responsible for spills are not transmitted to the tray by the flexible handle. Radial forces generated during swinging motion only force the liquid into the container more firmly. An inexpensive demonstration to intrigue students and challenge their analytical powers! Includes activity guide. 5" x 5" x 9". Weight: .25 lbs.
The design of the Spillnot uses the principles of Newtonian physics to keep the liquid in the container. The flexible handle and location of the suspension point above the center of the tray ensure that the forces on the liquid are always directed toward the supporting tray, even when the tray is in motion. Sideways forces usually responsible for spills are not transmitted to the tray by the flexible handle. Radial forces generated during swinging motion only force the liquid into the container more firmly. An inexpensive demonstration to intrigue students and challenge their analytical powers! Includes activity guide. 5" x 5" x 9". Weight: .25 lbs.

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$19.50 Each