Acertain radioactive (parent) nucleus transforms to a different (daughter) nucleus by emitting an electron and a neutrino. the parent was at rest at the origin of an xy coordinate system. the electron moves away from the origin with linear momentum (-5.6 x 10-22 kg m/s) ; the neutrino moves away from the origin with linear momentum (-6.9 x 10-23 kg m/s) . what are (a) the magnitude and (b) angle (from the +x axis) of the linear momentum of the daughter nucleus? (c) if the daughter nucleus has a mass of 8.7 x 10-26 kg, what is its kinetic energy?

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.