How does the magnitude of the buoyancy force compare with the weight of the subm

Question

How does the magnitude of the buoyancy force compare with the weight of the submerged brick? The buoyancy force is greater than less than the weight of the object. How do you know? How does the magnitude of the buoyancy force compare with the weight of the wooden block? The buoyancy force is greater than less than the weight of the object. How do you know? If you measured the buoyancy force on an object submerged in molasses instead of water, how exactly would your buoyancy force values differ? Which would be greater or lower? Why? The hulls and frames of ships are made from metal, which is much denser than water. How do ships stay afloat? Consider a submarine submerged in the Pacific Ocean. Subs have propellers to move forward and backward and vertical and horizontal rudders to direct water flow, but they also must be able to move up or down in the water without the use of the rudders in the event of engine failure. Because of the thick solid iron hull, a sub is not able to change its overall total volume. However, it does shrink very slightly as dives, in response to increased water pressure. This causes loud creaks when the sub changes depth. Knowing that the sub cannot change its total submerged volume, what variable relevant to buoyancy does a sub therefore have to physically change in order to change its depth? How exactly does it change this variable?

Explanation / Answer

1). Buoyancy force is the force exerted in the upward direction by the liquid when an object is put in it. Now when we put the brick in the water, it will submerged in the water. Thus we can say that Weight of the brick is greater than the Buoyancy force due to which it will submerged in the water as Weight acts in downward direction while Buoyancy force acts upwards and brick moves downwards in water.

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