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Locus Discussion Board Physics Mechanics
Re:Fluids (1 viewing)
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TOPIC: Re:Fluids
#306
niraj001 (User)
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Re:Fluids 10 Month 18 Day 1 Hour 37 Min ago Karma: 16  
.

Post edited by: niraj001, at: 2008/02/21 16:17
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#307
niraj001 (User)
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Re:Fluids 10 Month 18 Day 1 Hour 29 Min ago Karma: 16  

In the case of minimum SG the sphere is about to leave the bottom and hence the net upward force calculated on it in the fig should be equal to its weight which is (VOL.)(density)(g).
Solving we get (SG)min = 0.7
Hence, for the sphere to stay in equilibrium at the bottom SG > 0.7
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#308
anandhegde (User)
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Re:Fluids 10 Month 17 Day 11 Hour 37 Min ago Karma: 6  
Sir....how did you take buoyant force = 4/3xpiexR^3xdensity of waterxg


I feel calculating upthrust involves integration....
Correct me if I'm wrong
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#309
niraj001 (User)
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Re:Fluids 10 Month 17 Day 10 Hour 4 Min ago Karma: 16  
Exact answer needs an integration but i have taken an approximation here which does not affect the correct result.Replace the part of the sphere outside the whole by a flat surface and and still consider its volume as that of the original sphere.
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