A 1-kg beaker containing 2 kg of oil(density = 916 kg/m^3) rests on a scale. A 2kg block of iron is suspended from a spring scale and completely submerged in the oil. Find the equilibruim readings of both scales. For the bottom scale, I can find the weight, 29.4 N of the beaker and oil, but I'm not sure how to calculate how much weight the iron block contributes. I know buoyancy force = p*V*g but how would affect the weight on the scale?