Question

A submarine has tanks built into it, to enable it to dive beneath the surface or float on the surface of the water.
Which of the following correctly explains how this happens?

1 When the tanks are empty, the density of the submarine increases and it floats on the surface.
2 When water fills the tanks, the density of the submarine increases and it sinks beneath the surface.
3 When the tanks are empty, the density of the submarine decreases and it sinks beneath the surface.
4 When water fills the tanks, the density of the submarine decreases and it floats on the surface.

Answer 1

Answer:

1 Answer. Buoyant force is directly proportional to the density of the fluid in which an object is immersed. Buoyancy is the tendency to rise or float in a fluid. The upward force exerted on objects submerged in fluids is called the buoyant force.

Explanation:

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