Don't solve the problem, just tell me how to solve it: if a cube of lead (p = 11.3 x 10^3 kg/m^3) is placed in a pool of mercury (p = 13.6 x 10^3 kg/m^3). the cube of lead is 3.60 x 10^2 cm on a side. Calculate the percentage of the cube that is above the pool of mercury.

Question

anonymous · Answer

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The lead cube is in the equilibrium position. by inertia principle you can conclude that sum of all forces has to be zero. Fg+Fl=0 (these are vector)  then 

Fg=Fl ...  Vs*d(mercury)*g = M(lead)*g   then you can find sink volume Vs.