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.
When Daimler-Benz (makers of Mercedes-Benz cars) says that the automobile was invented in 1886 by Karl Benz and Gottlieb Daimler, it's basing its claim on its own definition: a light carriage for personal transport with three or four wheels, powered by a liquid-fueled internal combustion engine. hen was the first automobile built? Daimler and Benz are traditionally credited with building the first cars in 1886, but the French claim it was first built in 1884 by Delamare-Deboutteville.