The area of the larger piston of a hydraulic press is 50 times greater than the area of the smaller piston if a force of 40N is applied on the smaller piston ,what load can be lifted. at the larger piston​

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.

D. a  bar magnet with its south pole on the left

Electrons have a negative charge if that's what you're asking