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.
The early history of the automobile can be divided into a number of eras, based on the prevalent means of propulsion. Later periods were defined by trends in exterior styling, size, and utility preferences. In 1769 the first steam-powered automobile capable of human transportation was built by Nicolas-Joseph Cugnot.
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.