Arectangular pantoon 12m long 9m wide and 3m deep weights 1380 kn and floats in a sea water. the pantoon caries on its pper deck a boiler 6 m daiameter and weighting 864kn. the centre of gravity of each unit coincides with geometrical center of the arrangement and lies in the same vertical line. what is the metacentric height? is the arrangement stable?

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.