TERMODYNAMICS A device that demonstrates the linear (thermal) expansion of metals HG0021
This set helps to perform a qualitative comparison of the degree of thermal linear expansion of the three materials: steel, aluminum and brass in the form of rods. This live experiment, thanks to the indicators acting as single-sided levers with large leverage, allows the user to clearly assess the relative thermal expansion of the these metals. Structure/Technical description • the set consists of a matel base ( approx. 23 x 9 x 7 cm) with two brackets, three indicators in different colours (length: 19 cm) and plate holders, scale on brackets, three rods for experiments (steel, aluminium, brass, length: 18 cm, dia. 6 mm), convection limiter and a plate for alcohol (diameter 7 cm and height 1 cm) • till stock last
Instrument for demonstrating the thermal conductivity (expansion) of different metals HG1015 Device with 5 metal rods (arranged in the shape of a star) which allows the students to compare thermal conductivity of aluminium, brass, steel, zinc and copper by melting wax balls at the ends of the rods. Each rod has a notch to hold the wax. • length: approx. 340 mm; till stock last
Thermal expansion. Demonstration set QH0038 A demonstration set for thermal expansion of solids. • made of metal
AEROSTATICS
Vacuum bell jar HG0077
Newton’s tube HG0125
Pascal’s pressure sphere demonstration model HG0099
Boyle’a-Mariotte’s law demonstration model HG0096 The device demonstrates Boyle’s law i.e. it shows a relationship between the pressure and volume of air at a constant temperature. The user can experiment with the elasticity of a measured amount of gas. Turning the handle compresses the air. The volume, temperature and pressure can be read from the display screen on the scales. • box dim.: 24 x 19 x 15 cm
A vacuum bell jar for experiments in low pressure conditions; made of transparent plastic cloche and a base with a rubber sealing ring. It has an electric bell and
An apparatus for demonstrating how the motion of objects follows Newton’s second law of motion. • size: 5.8 x 95 cm • the tube contains a magnet, metal coin and a feather • till stock last
A device to present Pascal’s law in action. It is made of a steel sphere connected to a tubular manual pump. The sphere is pierced with small holes. After filling it with water and pushing the piston the water squirts out in even jets. • L 35 - 53 cm, sphere D 8 cm, sphere V 0.2 l • 9–10 holes
a hand pump. • base 19 x 25 cm • cloche D 15 cm • material: plastic • age: 14+
Archimedes’ Law. Demonstration set QH0031
Hand vacuum pump HG0078
A hand pump equipped with two nozzles. One of them is used to pump out the air to create a vacuum, while the other nozzle generates overpressure, which will allow air to be pumped into, for example, a balloon. Connection with HG0077 Vacuum bell jar. • the inner diam. of the cylinder 2.25 cm • length: 20 cm, nozzles: outer diam.: 0.9 cm • hand grip: diam.: 2.8 cm, length: 10 cm • material: steel, plastic, wood • max. pressure: ≤ 6.7 x 103 Pa (500 mmHg), min. pressure: 2.9 x 105 Pa (3 kgf /cm 2 ) • hose: 30 cm long; till stock last
The set for demonstrating Archimedes’ law, the basic law of hydro - and aerostatics, which determines the buoyancy force. The teaching aid makes it possible to explain the principle of Archimedes’ law for bodies immersed in water. The kit includes: • main container with drainage tube - overflow container • graduated gravity container • graduated beaker with measuring cup • 10 weights • weight spring • dimn.: 17.5 x 4 x 7 cm • age: 6+
Magdeburg hemispheres QH2115
2 hemispheres, with handles attached, for demonstrating the operation of atmospheric pressure when the two elements are pressed together so that the rims fit together and the air is next sucked out. • D 12 cm; made of plastic and rubber; till stock last
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