Spring Iron
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A 6 kg iron block is suspended from a spring scale and is submerged in a fluid of unknown density...?
he spring scale reads 7.30 N. What is the density of the fluid?
here we have a problem of Archimede's principle
it possible to write
7.3+P-mg=0
where P is the buoyant force and is equal to the weight of the displacef fluid
P=dVg where d is the liquid density, V the volume of the iron object and g=9,8
V is the volume of the object and is equal to V=m/si where si is the density of iron in kg/m^3
If we mix that together we will have
7.3+dVg-mg=0
7.3+dg m/si-mg=0
Then
(mg-7.3)*si/mg = d
where d is the density of the unknown liquid
m= 6 kg, g=9.8 and sidensity of iron… It is around 2500 kg/m^3, I don't have any handbook, so you will have to find it before doing any calculus
good luck
P.A.
Trellis Wrought Iron Spring Action Chairs from Wrought Iron Furniture Group
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