Question

3. How does the buoyant force acting on a body change in the following cases:
(a) The volume of a body is decreased, without decreasing its mass.
(b) The volume of a body is increased, without increasing its mass.
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(c) The body is placed in a liquid with lower density
(d) The body is placed in a liquid with higher density
(e) The liquid is gently heated.
(1) The liquid is placed in freezing mixture​

Answer 1

1. Answer:
2. : the tendency of a body to float or to rise when submerged in a fluid testing an object's buoyancy. b chemistry : the power of a fluid to exert an upward force on a body placed in it the buoyancy of water also : the upward force exerted.

Answer-I think the answer is (c)the body is placed in a liquid with lower density

Explanation:

1. The fluid pushes on all sides of an immersed object, but as pressure increases with depth, the push is stronger on the bottom surface of the object than in the top (as seen in ). You can calculate the buoyant force on an object by adding up the forces exerted on all of an object's sides.
2. Notice how the buoyant force only depends on the density of the fluid ρ in which the object is submerged, the acceleration due to gravity g, and the volume of the displaced fluid V f V_f VfV, start subscript, f, end subscript. Surprisingly the buoyant force doesn't depend on the overall depth of the object submerged.
3. An object will float if the buoyancy force exerted on it by the fluid balances its weight, i.e. if FB=mg F B = mg . But the Archimedes principle states that the buoyant force is the weight of the fluid displaced. So, for a floating object on a liquid, the weight of the displaced liquid is the weight of the object.

Archimedes' principle, physical law of buoyancy, discovered by the ancient Greek mathematician and inventor Archimedes, stating that any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force, the magnitude of which is equal to the weight of the fluid ...