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.
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.