A container of water is sitting on a scale. Originally, the scale reads M_{1}=45 \mathrm{~kg}. A block of wood is suspended from a second scale; originally the scale read M_{2}=12 \mathrm{~kg}. The density of wood is 0.60 \mathrm{~g} / \mathrm{cm}^{3}; the density of the water is 1.00 \mathrm{~g} / \mathrm{cm}^{3}. The block of wood is lowered into the water until half of the block is beneath the surface. What is the resulting reading on the scales?
Answer Choices
A. M_{1}=45 \mathrm{~kg} and M_{2}=2 \mathrm{~kg}.
B. M_{1}=45 \mathrm{~kg} and M_{2}=6 \mathrm{~kg}.
C. M_{1}=45 \mathrm{~kg} and M_{2}=10 \mathrm{~kg}.
D. M_{1}=55 \mathrm{~kg} and M_{2}=6 \mathrm{~kg}.
E. M_{1}=55 \mathrm{~kg} and M_{2}=2 \mathrm{~kg}.
