Io's metallic core makes up approximately 20% of its mass. Depending on the amount of sulfur in the core, the core has a radius between 350 and 650 km (220â400 mi) if it is composed almost entirely of iron, or between 550 and 900 km (340â560 mi) for a core consisting of a mix of iron and sulfur.
In 1886, Karl Benz developed a petrol- or gasoline-powered automobile. This is also considered to be the first production vehicle as Benz made several other identical copies. At the turn of the 20th century electrically powered automobiles appeared but only occupied a niche market until the turn of the 21st century.
Karl Benz patented the three-wheeled Motor Car in 1886. It was the first true, modern automobile. Benz also patented his own throttle system, spark plugs, gear shifters, a water radiator, a carburetor and other fundamentals to the automobile.ong history of the car. Benz patented the first gasoline-powered car, but he wasn't the original visionary of self-propelled vehicles. Some highlights in the history of the car: 1  Leonardo da Vinci had sketched a horseless, mechanized cart in the early 1500s.