At right, an ice cube (r = 920 kg/m3) is a rest on the bottom of a container of benzene (r = 900 kg/m3). The cube is 10 cm on a side. 3) What buoyant force acts on the ice cube? 4) What normal force does the bottom of the container exert on the ice cube? The cube is attached to a string hanging from a spring scale and lifted off the bottom of the container. 5) What is the reading (in kg) on the spring scale