A solid has a mass of 200g in Air and when partly immersed in a certain liquid, it has a mass of 160g. Given that the relative density of the liquid is 0.8,calculate the volume of the solid immersed in the liquid

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?