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.
In 1885 Karl Benz (Mercedes-Benz) invented what is now considered to be the first automobile, though Henry Ford is widely credited for bringing the car to the masses when he â¦ perfected the concept of the assembly line and being able to mass produce them in the early 1900's.t is argued that this constitutes the first 'car' ever invented, but the design was only 65cm long, had no seats or pilot controls, and was intended as little more than a toy. Further, there is little evidence that the invention was ever actually built.