Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: one is lead(11.3g/ml), and the other is aluminum(2.70g/ml) Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of the cylinder?

Question

Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: one is lead(11.3g/ml), and the other is aluminum(2.70g/ml)  Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of the cylinder?

Damon · Answer

They both displace the same volume and mass of water so both weights are reduced by density of water * g * volume of cube

DrBob222 · Answer

You asked this same question last night (actually you finished the question last night). Bob Pursely answered the question, you questioned his answer and I followed up with the same answer Damon has given you here. You may as well accept the answer because it's right; both cubes, if they have the same volume, displace the same amount of water. The old water volume is 40 cc, you displace 8 cc so the new water volume is 48 cc for BOTH. It makes no difference what the identity is. You can have 8 cc lead, 8 cc aluminum, or 8 cc of feathers and 40 + 8 = 48. Period.