I've got an interesting question about a Buoyancy problem we were given in Lab today. We were given an unknown block and we were asked to find its density without directly measuring its volume. So we found the mass in air and in water. Mass in air was 267.65g Mass in water was 237.76g Then using the equation T+Bwater=mg we found the volume of the block. We then found the density using density = m/V. My desnity came out to be 8.58x103 kg/m3 He then said that because we didn't account for the buoyant force of air that our density will be off a bit. So my question is how would you find the exact mass and volume of the unknown block if they BOTH change with no buoyant force. I am always left with two variables that I cant find no matter how many different ways i try to combine equations. Is there a different approach? Its like trying to find the mass and volume of my unknown block in a vacuum but I don't have one :( Any help is greatly appreciated!