Why might the ancient Egyptians have wanted to control the Nile's flood waters?

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?

What made it increasingly difficult for president roosevelt to stay neutral during world war ii?

The were so closely connected to the tang dynasty that korean elites used chinese as their written language. they set up a statewide academy that trained government officials in the philosophy of .