A 150-kg spherical steel buoy 900 mm in diameter is to be anchored in salt water 15 m below the surface. Find the mass m of scrap iron to be sealed inside the buoy in order that the tension in the anchor cable where it attaches to the buoy will not exceed 1.5 kN.
For negligible change in water density, does the buoyancy depend on the depth of submergence?
