Sarah is sitting at the top of the slide in the school's playground. which of the following changes will increase sarah's kinetic energy? aan additional child is added to the top of the slide. bsarah is pushed and moves down the slide. csarah climbs down the ladder and off the slide. dthe ladder is moved to the other side of the yard.

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.

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.