Breckland Scientific 2021 Catalogue

Materials

Properties of Materials

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1 HOOKE’S LAW APPARATUS For demonstrating the material properties of a spring and proving Hooke’s Law: The extension in a spring within elastic limits is directly proportional to the load applied to it. Cat No. Description Price Per MTR-200-100 Hooke’s Law Apparatus 75.03 ea. 2 LASCELLS HOOKES LAW This apparatus from Lascells provides a robust and convenient method of verifying Hooke’s law. Unlike many other versions this apparatus is designed to allow students to investigate single springs and spring combinations in both series and parallel. The apparatus gives sensible single spring readings using only 100g. The apparatus is supplied with a robust hanger and pointer, a clear scale and 3 springs. (Clamp stand, boss and masses required but not included.) Cat No. Description Price Per MTR-215-120 Lascells Hookes Law 34.76 ea. 3 FLUID PRESSURE APPARATUS Known as the ‘Spouting Cylinder’. For demonstrating the increase in pressure of a liquid with the increase in depth of the liquid column. Made from painted tin sheet, with three spouts of the same size but at different heights down one side. Cat No. Description Price Per HPL-200-100 Fluid Pressure Apparatus 20.58 ea. 4 LIQUID LEVEL APPARATUS Comprises four glass tubes, each of different cross-sectional size and shape, connected together at the bottom through a common horizontal glass tube, sealed to a manifold and mounted on stand. Demonstrates that the liquid level in communicating vessels remains same irrespective of the shapes and sizes of the vessels. Cat No. Description Price Per HPL-250-100 Liquid Level Apparatus 25.29 ea. 5 MAGIC SNOW This remarkable material is a form of polyacrylamide. It is capable of absorbing many times its own weight in water but, unlike other hydrogels, it expands rapidly when it gets wet to form a snow-like mass. Injected into a stream of high pressure water, it emerges as the high pressure snow seen on TV and film sets. It is non-toxic and re-useable. As a rough guide to quantify what this snow will make; one handful is enough to make 1 bucket full of snow. supplied in a pot of 100g. Cat No. Description Price Per SMP-350-100 Magic Snow 8.44 100g 6 SMART FLUID Based on a foodstuff ingredient, this is the perfect non- toxic material for demonstrating and exploiting the remarkable property of shear thickening. When the powder is mixed with water, it forms a creamy white liquid that thickens if rapidly disturbed by stirring. It can change from fluid to almost solid and back again in a split second and provides a breath- taking demonstration of rheopectic behaviour - the opposite of thixotropic. Supplied in water soluble powder form: 500g bag. Cat No. Description Price Per SMP-700-100 Smart Fluid 3.96 500g 7 THERMOCHROMIC SHEET A good example of a ‘smart’ material, this self-adhesive plastic sheet material contains liquid crystal ‘ink’, which changes colour when heated above 27°C. Potential applications are many and varied e.g. temperature indication/warnings, body jewellery, displays. Try attaching a resistance wire (nichrome) to the back of the sheet, then pass a small current through the wire to produce dramatic colour change patterns. Supplied as a 150 x 150 mm sheet. Can be easily cut to size, as required. Cat No. Description Size Price Per SMC-450-100 Thermochromic Sheet 150x150mm 6.81 ea.

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Hooke’s Law Apparatus

Lascells Hooke’s Law Apparatus

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Fluid Pressure Apparatus

Liquid Level Apparatus

Smart Materials

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Magic Snow

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Smart Fluid

Thermochromic Sheet

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