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.
If you take the steam car models into consideration, the first car ever made was the steam car built by Ferdinand Verbiest, but if you only take the gasoline powered models into consideration, the distinction of being the first car goes to the car invented by Karl Benz in 1885.