Question

what physical property of matter do you need more of to make an object float?
density
mass
volume
rewatch

Explanation:

To make an object float, we compare its density to the fluid's density. If an object's density is less than the fluid's, it floats. Alternatively, increasing volume (while keeping mass relatively constant) decreases density ($
ho = \frac{m}{V}$). Increasing mass alone would increase density, making it less likely to float. So, to float, we need less density (or more volume to lower density). But among the options, the key is that increasing volume (while mass is controlled) helps. Wait, no—wait, the question is "what physical property do you need more of". Let's recall: Buoyancy depends on displaced fluid volume (Archimedes' principle). An object floats if its weight (mass × g) is less than buoyant force (density of fluid × volume displaced × g). So, if we increase the object's volume (while mass doesn't increase much), its density ($\frac{m}{V}$) decreases. So, to make it float, we need more volume (so that the displaced fluid volume can provide enough buoyant force, or the object's density becomes less than fluid's). Alternatively, density: if we have less density, but the question is "need more of". Wait, maybe I got it wrong. Wait, the options are density, mass, volume. Let's think again. If an object has low density (less mass per unit volume), it floats. So, to make it float, we need the object's density to be less than the fluid's. So, if we can increase volume (while mass is same or increases less), density decreases. So, the physical property to increase is volume. Because increasing volume (with mass constant or increasing less) reduces density. So the correct option is volume.

Answer:

The correct option is the checkbox next to "volume" (the third option: volume).