Problem: at the local swimming hole, a favorite trick is torun
horizontally off a cliff that is 8.3m above the water. once diver
runs off the edge of the cliff, tucks into a ball androtates on the
way down with an average angular speed of 1.6rev/s.
ignore air resistance and determine the number of revolutions
shemakes while on the way down.

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.

26.4 is about the right time