Yes. Any material object in a fluid is "buoyed" up by a force equal to the weight of the fluid it displaces In air, the weight of the rock is reduced by an amount equal to the weight of the air that would otherwise occupy the rock's volume if the rock were not there.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.