Lewis has two spheres made of different substances. Sphere A has a volume of 19.4 cubic centimeters and a mass of 24.0 grams. Sphere B has a volume of 17.0 cubic centimeters and a mass of 13.6 grams. Lewis knows that the density of water is 1.0 grams/cubic centimeter. If Lewis places both spheres in a tub of water, which will float?