Asteel block has a volume of 0.08 m 3 and a density of 7,840 kg/m 3 . what is the force of gravity acting on the block (weight) in water?

a) 6,700.56 n
b) 6,150.64 n
c) 7,600.18 n
d) 5,362.56 n

The answer is A: 5,362.56 N 

The weight of block in air will be density times the volume of block(0.08 X 7840 = 627.2kg) and the subtracting the density of water times the volume of block(0.08 X 1000 = 80kg) from this we'll get the weight of block in water (627.2 - 80 = 547.2kg). Now we have to find the answer in Newtons so simply multiply it with 9.8 (547.2 X 9.8 = 5,362.56N).

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.

2. they have negligible mass.