Recent content by germoneyswis

so shouldnt it be $$r_E + (h-H)$$ and $$H+r_D$$

i do not understand what $$r_E$$ really means. is it the radius of the iron deposit? if so why did you say its a lot greater than H and h. if its the radius of earth why did you add in the second formula this radius by the height of the ocean?

does the solution provided in the pdf make more sense?

i substracted the gravitational potential energy caused by the iron deposit from the potential energy before it was placed there (mgh) to find H

what i understand i have to do is find the formula for the potential energy with this iron deposit and substract it from the potential energy before this iron deposit was placed there. I found the solution but i do not undsrstand why the formula for potential gravitation energy was used. what i...