Chapter Review Questions and Problems 1. Vector A as magnitude of Sunits and makes an angle of 45° with the positive Vector B also has the same magnitude of Sunits and directed along the negative a Find The magnitude and direction of A+ B b. The magnitude and direction of A - B 1​

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.

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.

The answer is -6hope this