Energy

This demonstration model facilitates the understanding of how dynamo works, thanks to the open and exposed design. A mounted armature, comprising two coils of copper wire, is rotated about horizontal axis by turning the hand cranked drive wheel within magnetic field, created by the permanent U-magnet supplied with the unit. Mounted on plastic base with LED and two mm sockets for connection to measuring instruments. Drive Wheel Dimemsions (Dia.): 140 mm. Base Dimensions (W x L): 150 x 200 mm.

This unit can be used for variety of purposes to illustrate energy transfers: it can be used to lift mass or stretch bungee cord, and to generate an electrical current when the mass falls again or the bungee cord is released. It can also be turned by hand to generate current. The motor/generator (6-9 V) is mounted on robust metal base, and the gearing of the unit and the sizes of the pulleys have been chosen to enable variety of qualitative and quantitative experiments to be undertaken.

A hand driven pulley coupled to the smaller dynamo pulley by a rubber belt to give step-up ratio, to generate both AC and DC. Electrical output is via 2 pairs of 4 mm sockets (AC and DC) and two LEDs.

Belt for demonstration dynamo AC/DC HE53710.

This demonstration motor comes ready assembled, with an open construction which clearly shows the design working parts of a simple motor. The motor is mounted on a robust wooden base with acrylic end plates with 4mm sockets and comes complete with ceramic magnets and yoke. Requires 1 -3 Volt DC laboratory power supply (not included). Overall Dimensions (L x W x H): 125 x 75 x 60 mm.

This self assembly motor kit is very robust and clearly demonstrates the constituent parts of DC motor.

A model of the simplest form of DC electric motor, having 2-pole armature wound with enamelled copper wire, and permanent magnetic field provided by removable bar magnet. The construction of the model is completely open and all components are readily observable. A disc-type commutator is incorporated and external connection to the phosphorous bronze bushes is by means of a pair of 4 mm sockets. The motor operates on 6-8 V DC.

For experiments on specific heat capacity, cylindrical with 13 mm diameter central hole to accept immersion heater and off-set hole for thermometer. Mass of each block approx. 1 kg.

For experiments on specific heat capacity, cylindrical with 13 mm diameter central hole to accept immersion heater and off-set hole for thermometer. Mass of each block approx. 1 kg.

For experiments on specific heat capacity, cylindrical with 13 mm diameter central hole to accept immersion heater and off-set hole for thermometer. Mass of each block approx. 1 kg.

For experiments on specific heat capacity, cylindrical with 13 mm diameter central hole to accept immersion heater and off-set hole for thermometer. Mass of each block approx. 1 kg.

Suitable for calorimeter blocks. 50 W fully sheathed 12 V 5 A AC or DC heater with 4 mm sockets. Dimensions (Dia. X L): 12.5 x 100 mm.

With parallel sides and rolled rim. 50 mm diameter x 75 mm height.

With parallel sides and rolled rim. 50 mm diameter x 75 mm height.

A novel design that fits into the top of polystyrene or paper cups. A 2.2 Ohm heating element can be powered from a low voltage supply via the 4 mm sockets in the cap. A hole in the top allows thermometer to be inserted. Ideal for energy transfer, power and specific heat experiments. Diameter: 65 mm. Height: 75 mm.

Thick sleeves and base mat to fit calorimeters.

Thick sleeves and base mat to fit calorimeters.

Insulating covers made from white PVC to fit calorimeters. Each cover has a central hole for a thermometer and a smaller hole for stirrer.

Insulating covers made from white PVC to fit calorimeters. Each cover has a central hole for a thermometer and a smaller hole for stirrer.

With parallel sides, rolled rim and thicker than average walls.

With parallel sides, rolled rim and thicker than average walls.

With parallel sides, rolled rim and smoothed internal side walls. 50 mm diameter x 75 mm height.

With parallel sides, rolled rim and smoothed internal side walls. 75 mm diameter x 100 mm height.

For use as driving unit /dynamo. Comprises - 6 V D.C. motor provided with 15 mm diameter 'V' pulley. Base size 15 x 10 cm.

For showing the conversion from electrical energy via mechanical to potential energy by winding up weight on cord. One end of the 6 mm steel shaft carries an aluminium 'V' pulley 56 mm diameter and the other end is fitted with cord anchoring collar. Base size 15 x 20 cm.

This is small low consumption electric motor on base specially designed to run directly from the output of the solar cell and to illustrate the direct conversion of light energy to electrical and hence to mechanical.

For use with the motor to demonstrate the production of electrical energy directly from light energy. The apparatus comprises aselenium photo-voltaic cell.

Developed for the Science Enhancement Programme (SEP) this single unit demonstrates range of different energy transfers; for example, how energy is transferred electrically from hand-turned dynamo to motor. The unit is accompanied by booklet that discusses some of the key teaching and learning issues that surround the energy concept, and provides series of activities that illustrate how the unit can be used to develop simple and coherent ways of talking about energy.

The generator is mounted in transparent plastic housing. Using a handle and exchange gear, the generator can yield power output of up to 7.5 watts. The generator unit is supplied with an E10 socket for small bulbs and leads with mini crocodile clips for attachment to electrolysis experiments, measuring instruments, electrical circuits, etc. The set consists of two hand generator units (complete with bulb, cable and mini crocodile clips) and includes complete user instructions and a spare bulb.

An affordable Stirling engine which works at very low temperature differences. A cup of warm water (must be at least 60 °C) can make the motor run, which means that water heated by sunlight can become hot enough to drive this motor. Like other Stirling engines, this type works by converting temperature differences into mechanical energy as warm air expands and cold air contracts. This is utilized in closed system where the same air is pumped back and forth between cold and hot engine part. Illustrates perfectly how Stirling engines operate and can be used with many different heat sources. Weight: 330 g. Dimensions (H x W x D): 144 x 90 x 90 mm.

A functional glass model of the earliest form of steam turbine. Comprising borosilicate glass bulb 70 mm diameter, with side arms bent at right angles and formed into jets at their tips. The bulb is carried upon a metal stand which leaves it free to rotate about its horizontal axis. With 25-30 mL of water put into the bulb and boiled, the increased pressure ejects steam, which causes rapid rotation as per Newton's third law. Supplied complete on stand but without burner.

Spare glass bulb for Hero's Engine, HE180500.

The 'Singing Pipe' apparatus is a simple, effective and entertaining way to demonstrate energy conversion from heat (thermal energy) to sound energy. Quick and easy to set up and use, this demonstration rarely fails to impress. The apparatus consists of a 450 x 28 mm copper tube which has a metal gauze fitted inside, at pinch point part way up from the base. The tube should be supported by a retort clamp towards the top, away from the heat, and blue Bunsen burner flame directed into the base and onto the gauze for few seconds only. Shortly after removing the flame, the tube emits loud 'foghorn' sound as air is drawn up the tube by heat rising from the hot gauze. If the tube becomes too hot it will stop emitting sound, in which case it should be allowed to cool before trying again.

Solar panel consisting of 36 monocrystalline solar cells mounted in an aluminium frame with front glass panel. Complete with shrouded 4 mm plug leads. • Maximum output: 18.0 V / 0.58 A • Open-circuit voltage: 22 V • Short-circuit current: 0.6 A • Dimensions: 383 x 299 x 34 mm

Fitted with threaded stud terminals. Output 0.45 V. May be fitted together for increased power. 400 mA. 75 x 45 x 7.5 mm (L x W x H)

Fitted with threaded stud terminals. Output 0.45 V. May be fitted together for increased power. 400 mA. 75 x 45 x 7.5 mm (L x W x H)

A kit comprising 8 solar modules, low-inertia motor, impeller, connecting lead and copper links for cell interconnections and housings and brackets to enable the construction of various solar powered projects. The modular concept of this kit enables experimentation with differing voltages and currents to produce the required circuit. The kit also includes comprehensive booklet covering principles of solar power, together with useful connection diagrams and output calculation formulae.

A powerful compact engine capable of driving workshop models. Uses solid fuel tablets.

A versatile unit capable of driving larger models. Uses solid fuel tablets.

Suitable for Mamod steam engines. Supplied in pack of 20 tablets.

A twin cylinder stationary engine complete with generator and light.

Thermal conductivity apparatus for use witha tea light candle or small bunsen burner flame. The unit has an integral polished wooden handle and metal rods (aluminium, brass, mild steel, copper and nickel) mounted ina brass centre block. Students can discover which metals conduct heat the most efficiently by placing small amount of wax at the end of each rod and seeing which melts first when heat is applied to the centre block. Wax not included. Rod Dimensions (Dia. x L): 4 x 75mm.

Consists of four metal strips (aluminium, brass, copper and iron) mounted on a wooden ring. The outer end of the strips are formed into small cup to contain wax. Suitable for use with a small bunsen flame or tea light/candle.

Conductivity rods, aluminium. Diameter 3 mm x 30 cm length.

Conductivity rods, copper. Diameter 3 mm x 30 cm length.

Conductivity rods, iron. Diameter 3 mm x 30 cm length.

Conductivity rods, brass. Diameter 3 mm x 25 cm length.

Set of rods, one each of aluminium, brass, copper, and iron. Dimensions (L x Dia.): 250 x 3 mm.

These are safe, clean (no wax) and easy to use. The durable liquid crystal strips embedded in the bars show how a red zone of 40°C moves up the bars. The colours give a dramatic view of conduction and the marked difference in temperature gradients in the bars is also visible. By immersing the heated bars into cold water shows how conductivity applies to heat leaving the metal. The tops of the bars are designed to be touched with finger tip to reinforce the colour observations.

These are safe, clean (no wax) and easy to use. The durable liquid crystal strips embedded in the bars show how red zone of 40°C moves up the bars. The colours give dramatic view of conduction and the marked difference in temperature gradients in the bars is also visible. By immersing the heated bars into cold water shows how conductivity applies to heat leaving the metal. The tops of the bars are designed to be touched with finger tip to reinforce the colour observations.Class set of 12 in a Gratnells tray.