why can a sub marine sink and float in the ocean
Answer (1)
A submarine's ability to sink and float is controlled by adjusting its buoyancy, which is the upward force exerted on an object submerged in a fluid (in this case, water). This is achieved through ballast tanks. When the submarine needs to sink, it floods these tanks with water, increasing its overall density. Because the submarine's density becomes greater than the surrounding water's density, the downward force of gravity overcomes the buoyant force, causing it to sink. Conversely, to rise, the submarine uses compressed air to expel the water from the ballast tanks. This reduces the submarine's overall density, making it less dense than the water. The buoyant force then becomes greater than the force of gravity, allowing the submarine to float to the surface. The process is carefully controlled to maintain the submarine at a desired depth.
