if an object sinks in a particular fluid,the weight density (weight/volume) of the object will less than, equal to, or greater than, the weight density of the fluid

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To determine whether an object will sink or float in a particular fluid, we need to compare the weight density (weight/volume) of the object with the weight density of the fluid.

If the weight density of the object is greater than the weight density of the fluid, the object will sink. This is because the upward buoyant force exerted by the fluid on the object is not enough to counteract the weight of the object.

If the weight density of the object is equal to the weight density of the fluid, the object will float in a neutral position. In this case, the buoyant force on the object is equal to the weight of the object, allowing it to float without sinking or rising.

If the weight density of the object is less than the weight density of the fluid, the object will float. The buoyant force exerted by the fluid on the object is greater than the object's weight, causing it to float on the surface.

In summary, for an object to sink, its weight density must be greater than the weight density of the fluid. If the weight density is equal, the object will float in a neutral position, and if the weight density is less, the object will float.