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.
Answer Karl Benz in 1885 Answer The first car was invented in the year of 1769 by a Frenchman named Nicolas Joseph Cugnot. iI was built under his instructions in the Paris â¦ Arsenal by Mechanic Brezin.he first car was invented in the year of 1769 by a French man named Nicolas Joseph Cugnot, who build it under his instructions in the Paris Arsenal by Mechanic Brezin.