Here's why the confusion might arise:
* Apparent Weight Change: When a rock is submerged, it experiences an upward force called buoyancy. This force is equal to the weight of the water displaced by the rock. This makes the rock feel lighter, but its actual weight hasn't changed.
* Density vs. Buoyancy: Density is calculated as mass divided by volume. While the rock's weight might seem to change due to buoyancy, its mass and volume remain constant, thus its density remains the same.
In summary, the rock's density doesn't change when submerged. The apparent change in weight is due to the buoyant force of the water.
