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.
Ferdinand Verbiest, a Christian missionary in China, built the first car in 1672. He designed the vehicle as a toy for the Chinese Emperor. It was only a small vehicle, unable to transport people.t was powered by steam. The first modern car was invented by German Karl Benz in 1885. His design used an internal combustion engine (as most cars do today). The internal combustion engine had actually been designed in 1806 by Swiss inventor Francois Isaac de Rivaz.