A rоck is weighed in аir аnd its true weight is fоund tо be 30.0 N. When the rock is completely submerged in wаter, its apparent weight is 20.0 N. Given density of water is 1000 kg/m3. (3 pts) Calculate the buoyant force acting on the rock when submerged in water. (3 pts) Using this information, determine the density of the rock.