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.
In 1879 Karl Benz was granted a patent for his first engine, which he designed in 1878. In 1885, Benz created the Motorwagen, the first commercial automobile, powered by a gasoline engine.It had three wheels, being steered by the front wheel and with the passengers and the engine being supported by the two in the rear some now refer to it as the Tri-Car.n 1885, Benz created the Motorwagen, the first commercial automobile, powered by a gasoline engine. It had three wheels, being steered by the front wheel and with the passengers and the engine being supported by the two in the rear some now refer to it as the Tri-Car.