Dimensional Analysis. Dimensional Analysis (also called Factor-Label Method or the Unit Factor Method) is a problem-solving method that uses the fact that any number or expression can be multiplied by one without changing its value. It is a useful technique.
In 1887, the first dry cell battery was invented. Unlike previous batteries, it used a paste electrolyte instead of a liquid.
A voltaic pile on display in the Tempio Voltiano (the Volta Temple) near Volta's home in Como. The voltaic pile was the first electrical battery that could continuously provide an electrical current to a circuit.It was invented by Alessandro Volta, who published his experiments in 1800.chematic diagram of a copper â zinc voltaic pile. The copper and zinc discs were separated by cardboard or felt spacers soaked in salt water (the electrolyte). Volta's original piles contained an additional zinc disk at the bottom, and an additional copper disk at the top. These were later shown to be unnecessary.