The cadmium in the control rods slows down a nuclear fission reaction by absorbing neutrons.

This statement is true. The cadmium in the control rods indeed slows down the nuclear reaction by absorbing the neutrons. Control rods are used during a nuclear fission, in order to control the reaction that is taking place and is composed of chemicals; silver, indium, and cadmium.

Less force and energy was applied

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.