PHYSICS 7E Lecture Notes - Lecture 3: Perfect Fluid, Daniel Bernoulli, Buoyancy

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17 Apr 2018

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Physics 7e - lecture 3 - fluid mechanics. The buoyant force is the upward force exerted by fluid on any immersed object. The buoyant force is the resultant force due to all forces applied by the fluid due to all forces applied by the fluid surrounding the object. The liquid in dashed circle is in equilibrium. The upward force, b , must equal (in magnitude) the downward gravitational force. The magnitude of the buoyant force always equals the weight of the fluid displaced by the object, and is independent of the composition the object. Archimedes" principle, crown example mcrown in ar = t 1 = 7. Archimedes was (supposedly) asked, is the crown gold? . Weight in water (submerged) = 6. 84 n. Buoyant force will equal the apparent weight loss. Difference in scale readings will be the buoyant force gv. B = v = ( 1 t 2. Then to find the material of the crown,

Related Questions

Archimedes’ Principle states that the buoyant force on an object partially or fully submerged in a fluid is equal to the weight of the fluid that the object displaces. Thus, for an object of density floating partly submerged in a fluid of density , the buoyant force is given by,

where 'g' is the acceleration due to gravity and is the area of a typical cross-section of the object (see the figure). The weight of the object is given by

Show that the percentage of the volume of the object above the surface of the liquid is

$A (y)$

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where g is the acceleration due to gravity and A(y) is the area of a typical cross-section of the object. The weight of the object is given by,

Show that the percentage of the volume of the object above the surface of the liquid is

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Archimedes’ Principle states that the buoyant force on an object partially or fully submerged in a fluid is equal to the weight of the fluid that the object displaces. Thus, for an object of density ρ0ρ0 floating partly submerged in a fluid of density ρfρf, the buoyant force is given by

where g is the acceleration due to gravity and A(y) is the area of a typical cross-section of the object (see the figure). The weight of the object is given by

(a) Show that the percentage of the volume of the object above the surface of the liquid is .

(b) The density of ice is and the density of seawater is . What percentage of the volume of an iceberg is above water?

(d) A sphere of radius and having negligible weight is floating in a large freshwater lake. How much work is required to completely submerge the sphere? The density of the water is .