There probably is significant error in volume calculation. If the volume was 52 mL instead of 48 mL, the density would be very close to the actual density. On second thought, my volume displacement measurement was probably less than the least measurable quantity on the graduated cylinder I used.
I recently bought a 1-pound .999 fine copper bar. I was curious to know how closely the density of my bar was with the actual density of copper (about 8.96 g/cc). My bar measured 1 pound .5 oz (467.76 g). I calculated the volume two ways, water displacement and measurement; the volume is...