Thermal Energy

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.

Five rods, one of each aluminium, brass, copper, zinc and iron, embedded along one side of metal tank. Rates of melting compared by placing wax on end of rods thus giving rates of conductivity in the different metals. Dimensions (L x W x H): 150 x 90 x 100mm.

The wood/metal cylinder offers a nice demonstration of conduction and insulation. The apparatus consists of a copper tube attached to a wooden rod of equal diameter. A piece of paper is wrapped tightly around the central section, covering the wood and metal parts, then the rod/cylinder is passed through a Bunsen burner flame for few seconds, making sure both wood and metal parts pass through the flame. The metal part conducts heat away so the paper hardly browns, but because the wood part is an insulator the paper covering gets scorched by the flame. Dimensions (L x Dia.): 190 x 22 mm.

Demonstrates the difference in conductivity of two different substances. Comprises two identical looking square blocks but of different materials, one of thermal conducting material and other of thermal insulating material. On placing ice on both of them, ice melts faster on one of them showing the difference in their conductivities.

This advanced ice melting kit nicely demonstrates the thermal conductivity of materials by using different types of metal blocks to melt ice cubes. The kit consists of an acrylic base with sump, an acrylic tube, two cylindrical copper blocks and two cylindrical steel blocks. The apparatus is set up by placing one of the copper blocks on top of the acrylic base. The base has an integral sump, which will contain the meltwater from an ice cube. The acrylic tube is then placed over the copper block, in order to contain the metal blocks and ice cube. An ice cube is then dropped down the tube onto the block and the second copper block is placed on top. Immediately the ice begins to melt, due to the high thermal conductivity of copper (along with large thermal mass), and in matter of 10-15 seconds the ice will have melted and disappeared. By repeating the experiment using the steel blocks it can be seen that the ice melts more slowly, due to the lower thermal conductivity of steel. Each experiment can be timed, for more accurate comparison between the two different metals. The kit also includes two plastic insulating discs, which can be placed between the ice and the metal blocks to show that it is not simply the pressure of the top block which is causing the ice to melt. If repeating the experiment using the same blocks, it is better to allow the blocks to come back up to room temperature first (if repeatable results are required). Contents: • Acrylic base and tube • 2 x 0.5 kg copper blocks • 2 x 0.5 kg steel blocks • 2 x plastic insulating discs Also required: Ice cubes, preferably quite large.

This apparatus offers quick and safe method for demonstrating comparative heat absorption from radiated heat source. The apparatus uses a 12 V 24W bulb as heat source, with parabolic metal dishes for heat absorption one finished in black and one in shiny metal. The dishes include integral holders for thermometers, to allow comparison of temperature readings (thermometers not included). Comes complete with instructions.

A safe, compact heat source, ideal for heat radiation experiments in schools. Comprising a base and cage enclosing a custom IR radiating lamp of the dull emitter type. • 300 W power output • Dimensions (W x D x H): 150 x 150 x 220 mm

A 10 cm cube with surfaces: dull black, shiny black, white and copper. The opening on top allows the cube to be filled with hot water, and the lid reduces both heat loss and the risk of spillage.

A novel way to investigate temperature, insulation, and body temperature. Heat sensitive thermochromic paper changes colour as the temperature rises, even from the heat of your hand. The paper is supplied in four colours blue/white, purple/pink, pink/white and green/yellow. Dimensions (L x W): 297 x 210 mm.

Consists of a metal box with a sliding glass front and two detachable glass chimneys. A lighted tea light (night light) is placed beneath the base of one chimney to create convection currents. (Tea lights not supplied). Dimensions (L x H x D): 240 x 90 x 70mm.

Spare chimneys for Convection in Air Apparatus, HE18736.

Consisting of rectangular glass tubing. Dimensions (W x L x Dia.): 210 x 360 x 22mm.

Two-piece set. Brass ring and brass ball mounted in wooden handles. Dimensions (L): 260 mm.

An improvement on the riveted version, this bonded copper and steel bimetallic strip comes mounted in a wooden handle for ease of use. Heating on either side causes the strip to bend as the two metals expand by different amounts. Comes with instructions. Dimensions (L incl. handle): 300mm); Bimetallic Strip (L x W) 200 x 13 mm.