Which describes the greatest displacement? a) walking 3m east, then walking 3m north, then 3m west b) walking 3m east, then 3m south, then 3m north c) walking 3m north, then 3m south, then walking 3m north d) walking 3m north, then 3m west, then 3m south you!

These choices produce displacements in different directions, but the magnitude of the displacement is 3m for each choice. None of the choices produces a displacement that's longer or shorter than any other choice.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.