Lava is molten rock discharged from a volcano during an eruption. Volcanic eruptions are caused by the ascent of magma to the surface of the earth. When freshly discharged, lava liquid is extremely hot; temperature ranges from 1300 °Fahrenheit to 2200 ° Fahrenheit.  Lava is quite thick in nature and can flow for long distances, before congealing into igneous rock. Lava is quite destructive, causing damage to property within the vicinity of a volcano. People are not usually affected by lava due its slow moving nature. However there have been Read More

A rotameter is a device that measures the flow rate of a liquid or gas in a tube. Karl Kueppers invented the rotameter in 1908, which has been widely used since then for a variety of applications. Rotameters are included in a class of devices known as “variable area meters” that depend on the substance they are measuring to change the area of the test field being measured. How Rotameters Work Rotameters consist of a tube, generally made of glass, and an object known as a “float.” The float is Read More