A cube of wood having an edge dimension of 20.7 cm and a density of 653 kg/m³ floats on water. (a) What is the distance from the horizontal top surface of the cube to the water level? 7.6 If a block is floating, the buoyant force must equal the weight of the block. cm (b) What mass of lead should be placed on the cube so that the top of the cube will be just level with the water surface? 3.7 The block is at rest so the buoyant force must equal the weight of the block plus the lead on top. What is the magnitude of the buoyant force if the block is completely submerged? kg

A cube of wood having an edge dimension of 20.7 cm and a density of 653 kg/m³ floats on water. (a) What is the distance from the horizontal top surface of the cube to the water level? 7.6 If a block is floating, the buoyant force must equal the weight of the block. cm (b) What mass of lead should be placed on the cube so that the top of the cube will be just level with the water surface? 3.7 The block is at rest so the buoyant force must equal the weight of the block plus the lead on top. What is the magnitude of the buoyant force if the block is completely submerged? kg