The diameter typically varies in the range 0.4–40 nm (i.e., “only” ~100 times), but the length can vary ~100,000,000,000 times, from 0.14 nm to 55.5 cm. The nanotube aspect ratio, or the length-to-diameter ratio, can be as high as 132,000,000:1, … Continue reading →

Steel is one of the strongest metals on the planet. When it comes to diamond blades, there are a few that can cut through steel. Certain blades like the Husqvarna High Pro 3 and 5 series are acceptable for cutting … Continue reading →

That being said, tungsten will stop a bullet if it’s thick enough but it is somewhat brittle so it isn’t a good choice for that and other reasons. Nothing is “bulletproof.” Objects are made to be “bullet resistant” to some … Continue reading →

Common opal, sometimes called “potch,” is usually colorless or white, but the presence of fine-grained impurities may color it gray, brown, yellow, or red. Is opal a stone or a color? But the opal, the October birthstone, was a talisman … Continue reading →

Platinum is an extremely rare metal, occurring at a concentration of only 0.005 ppm in Earth’s crust. It is sometimes mistaken for silver. Platinum is often found chemically uncombined as native platinum and as alloy with the other platinum-group metals … Continue reading →

Iron – One of the components of steel, and the go-to metal for tool and weapon makers throughout the ages, iron completes the list of the world’s strongest metals. Cast iron scores about 5 on the Mohs scale, and its … Continue reading →

The key difference between graphite and graphene is that graphite is an allotrope of carbon having a high number of carbon sheets whereas graphene is a single carbon sheet of graphite. Graphite is a well-known allotrope of carbon. Why is … Continue reading →

Natural abundance Lithium does not occur as the metal in nature, but is found combined in small amounts in nearly all igneous rocks and in the waters of many mineral springs. Spodumene, petalite, lepidolite, and amblygonite are the more important … Continue reading →

Semiconductor manufacturing depends on substances known as rare earth metals. These materials play an integral role in the manufacturing of most electronic devices. China has nearly monopolized the production of these metals. What rare earth elements are used in semiconductors? … Continue reading →

AGM technology is the norm for UPS batteries because of its lower cost, lower internal resistance and higher charge/discharge rates. By comparison, Gel-filled VRLA has a higher internal resistance, which makes it less suitable for high-rate discharging common with UPS … Continue reading →

DeWalt’s 20V MAX cordless drill/driver comes from one of the most respected names in professional power tools. It offers superb quality and excellent performance at an affordable price, so we couldn’t wait to run it through our battery of tests. … Continue reading →

A stuck closed voltage regulator typically causes high charging system voltage. Voltage regulators adjust output voltage according to the demands of the electrical system. In late-model vehicles, this is accomplished through a sensing circuit that informs the PCM of battery … Continue reading →