When a metallic object attached to a spring scale is lowered into water, it appears to weigh less. This is due to the buoyant force acting on the object. Here's why:

* Buoyant Force: Water exerts an upward force on any object submerged in it. This force is called the buoyant force and is equal to the weight of the water displaced by the object.

* Apparent Weight: The spring scale measures the apparent weight of the object, which is the difference between its actual weight and the buoyant force. Since the buoyant force acts upwards, it counteracts the object's weight, making it seem lighter.

In summary:

* The object's actual weight remains the same.

* The buoyant force reduces the apparent weight of the object.

Let me know if you would like a more detailed explanation of the buoyant force!