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A lava lamp is a decorative lamp that was invented in 1963 by British entrepreneur Edward Craven Walker, the founder of the lighting company Mathmos. It consists of a bolus of a special coloured wax mixture inside a glass vessel, the remainder of which contains clear or translucent liquid.
Grant then blew the lava lamp up using a squirt of cold water from a spray bottle to induce thermal shock—and the explosion lodged a piece of glass deep into the ballistics gel dummy planted near the lamp. With the combination of the violent explosion, glass shrapnel in the dummy, explicit warning labels (including a notice not to heat the ...
The heat produced by incandescent light bulbs is frequently seen as a drawback, but it is seen as an advantage in certain applications. For example, automotive applications in cold climates benefit from the radiated heat as it melts potentially visually-obstructive snow and ice on warning lights and signs.
Can a water heater explode like a rocket and shoot through the roof of a house? If a person is being dragged by a horse, can the friction caused by the movement make the jeans catch on fire? Can shrinking jeans by wearing them in a hot bath kill someone?
A wax coating makes this Manila hemp waterproof. A lava lamp is a novelty item that contains wax melted from below by a bulb. The wax rises and falls in decorative, molten blobs. Sealing wax was used to close important documents in the Middle Ages. Wax tablets were used as writing surfaces.
A chemistry professor explains the science that makes salt a cheap and efficient way to lower freezing temperature.
The classical Stefan problem aims to describe the evolution of the boundary between two phases of a material undergoing a phase change, for example the melting of a solid, such as ice to water. This is accomplished by solving heat equations in both regions, subject to given boundary and initial conditions. At the interface between the phases ...
The wax used within the thermostat is specially manufactured for the purpose. Unlike a standard paraffin wax, which has a relatively wide range of carbon chain lengths, a wax used in the thermostat application has a very narrow range of carbon molecule chains. The extent of the chains is usually determined by the melting characteristics ...