An object is submerged in water. If we increase the pressure of the air above th

Question

An object is submerged in water. If we increase the pressure of the air above the water by an amount Delta P, the pressure on the object will increase by an amount (a) greater than Delta P, (b) less than Delta P, or (c) equal to Delta P. Consider the density of the water to not be affected by the change of pressure. The two containers shown in the figure are filled with water to the same height. The bottom areas of the two containers are equal. In which container will the pressure at the bottom be the greatest? (a) container A (b) container B (c) same for both containers Two spheres have equal diameters. One sphere is made of wood and the other of steel. We hold both of them under water. For which sphere will the buoyant force be the greatest? (a) wood (b) steel (c) same for both spheres An object is submerged in water 10 m below the surface. If I move the object to 20 m below the surface, the buoyant force of the water on the object will (a) increase, (b) decrease, or (c) remain the same. Consider the density of the water and the volume of the object to not be affected by the change in depth.

Explanation / Answer

1.1 pressure wil imcrease by same amount acc to pascal law if we apply pressure on fluid the it wil transmit to whole fluid equally

1.2pressure at bottom in both cases wil be same as P=density×g×h height in both cases is same so pressure wil be same

1.3bouyant force = weight of fluid displaced by it

F=density of fluid ×V×g

V is same for both so bouyant force wil be same

1.4 bouyant force wil remain same as we can see from bouyant formula there is no such dependence

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