A steel blade floats on the surface of pure water. When detergent is added it sinks , why?

Explanation

To understand why a steel blade floats on pure water but sinks when detergent is added, we can break down the explanation into several steps:

### Step 1: Understanding Floating and Sinking
When an object floats, it is in equilibrium, meaning the forces acting on it are balanced. The weight of the object (mg) is balanced by the upward forces acting on it, which include the buoyant force and the force due to surface tension.

### Step 2: Forces Acting on the Steel Blade
In the case of the steel blade floating on pure water:
- **Weight (mg)**: The downward force due to gravity.
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