4.1. Cell voltage is modelled as the sum of the reversible and significant irreversible voltages [2], assuming identical cells, stack voltage is cell voltage multiplied by the number of cells. What factors affect voltage in a cell? Chemical cells use … Continue reading →

Discharge Voltage – the amount of battery voltage available at any given point while the battery is discharging. The voltage of a battery gradually decreases as it discharges. The rate of this decrease depends on the device it is powering … Continue reading →

In a ‘series’ connection the components are connected end-to-end in a line to form a single path for electrons to flow. Therefore the current does not change in a series combination of resistors. Why does current not change in a … Continue reading →

Over the next 10 to 25 years, graphene could replace silicon as the primary material in semiconductors, assuming research discovers methods to overcome its band-gap limitations. Can graphene be used as a semiconductor? —Graphene is a semi-metal and is a … Continue reading →

DANTONA INDUSTRIES Battery, 1.5 V, Alkaline, 100 mAh, Pressure Contact, 11.6 mm Battery Voltage 1.5V Battery Size Code – Battery Technology Alkaline Battery Capacity 100mAh Battery Terminals Pressure Contact How many mAh is a normal AA battery? For example AA … 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 →

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 →

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 →

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 →

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 →

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 →

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 →

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 →

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 →

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 →