Final answer:
The comparison between the weight of a liquid and fat usually refers to density, not weight. Fat is less dense than water and hence will float. This concept is related to the buoyant force described by Archimedes' principle.
Step-by-step explanation:
The question about whether liquid should weigh the same as or more than fat generally refers to comparing densities rather than weights directly. Density is a measure of mass per unit volume, and different substances have different densities. For example, fat is less dense than water, which is why it floats when placed in water. An object with a relative density less than 1 will float in water, indicating it is less dense; fat typically has a relative density less than 1. Answering this question involves understanding principles such as Archimedes' principle, which explains that the buoyant force on an object submerged in a fluid is equal to the weight of the fluid displaced by the object.