Fundamentally, Lady Macbeth fears Macbeth's sense of honor in preventing him from killing Duncan. She discloses her desire for power and in doing so, the reader/ audience understands how Macbeth is not comfortable in doing what is being asked of him.
Who invented the first car? The first car invented and built in 1885 and unveiled in 1886 by Karl Benz. The first car, Benz Patent Motorwagen, is the first car ever made in history powered by gasoline with an engine motorized by an internal combustion.
The first car that Cugnot made, the Steamer like the name implies was a steam-powered artillery tractor. William Murdoch built a steam-powered carriage in 1784. So, in fact, the first car invented or made in all of history was also the first steam car. Oliver Evans was granted the first American automobile patent in 1789. In 1805 Evans demonstrated the first American car (arguably) which was also an amphibious vehicle.