Homework Help: Physics

Posted by Kent on Monday, November 16, 2009 at 4:05pm.

A beaker of mass mb containing oil of mass m1 and density ρ1 rests on a scale. A block of iron of mass m2 and density ρ2 is suspended from a spring scale and completely submerged in the oil. Determine the equilibrium readings of both scales. (Use rho_1 for ρ1, rho_2 for ρ2, m_1 for m1, m_2 for m2, m_b for mb, and g when necessary.)

Physics - bobpursley, Monday, November 16, 2009 at 4:15pm
The idea here is to calculate the bouyant force in each liquid, and add that to the original mass, since the scale is now supporting that mass.

bouyantforce=massiron/densityiron

the reading on the scale will then be

massoil+bouyantforce.

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