Two ice skaters, with masses of 50.0 kg and 75.0 kg, are at the center of a 30.0 m-diameter circular rink. the skaters push off against each other and glide to opposite edges of the rink. if the heavier skater reaches the edge in 40.0 s, how long does the lighter skater take to reach the edge?

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.

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