Which of the following statements is true? Select one: O a. A vector can have positive or negative magnitudes.

O b. A vector's magnitude cannot be more than the magnitude of one of its components.

Oc. The magnitude of a vector cannot be zero unless all of its components are zero.

O d. If the x-component of a vector is smaller than its y-component then that vector is in the opposite direction to its y- component.

T/f If the magnitude of vector A is less than the magnitude of vector B, then the x-component of A is less than the x-component of B

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.