Daring darless wishes to cross the grand canyon of the snake river by being shot from a cannon. she wishes to be launched at 65 ∘ relative to the horizontal so she can spend more time in the air waving to the crowd.

with what minimum speed must she be launched to cross the 520-m gap?
express your answer to two significant figures and include the appropriate units.

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.