What is the density of a cube with a mass of 4.5 killograms and measures 100cm on each side

Remember that density is mass divided by volume. first u must calculate the volume. so do 100 to the power of 3(cause volume is width ×lenth×height so u end up having to do 100 ×100×100) in your calculator. U know the mass is 4.5 kilograms. simply do 4.5 divided by 100 to the power of 3.

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.