The buoyant force on a ball of weight w, dropped in a container of water is f. if the same ball is dropped into a container of liquid with half the density of water, the buoyant force on the ball will be

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.