posted by Breezy .
a plastic duck floats half-immersedi n water in the bathtub. What fraction of its volume would be immersed in a liquid of relative density 2.0?
If the density of the fluid is twice that of water, you only have to displace half as much to float. If it floats half-submerged in water, 3/4 can be above the denser fluid and 1/4 immersed below.