A girl turns over a plastic cup so that the open end is facing down, and then
completely submerges it in a pool of water. In doing so, she traps air in the
cup so that both the air and the cup have a volume of 237 cm
Approximately how much force must she use to keep the cup from popping
up out of the water, assuming that the weight of the cup and air can be
neglected? (Recall that the density of water is 0.001 kg/cm and g = 9.81
m/s2.)
O A. 7.5N
B. 2.3 N
O C. 11.6 N
O D. 4.6 N

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.

The answer is d) by requesting advice on science internet sites

That would be kinetic energy