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**1. A piece of copper whose density is 8.93 gm/cm^3 weighs 180 gm in air and 162 gm when submerged in a certain liquid. What is the density of the liquid?**

**2. d = m/v**

**3. I wasn't sure how to compute this but I calculated the volume of the copper based on its density and air weight, then I just used that volume and the submerged weight to get 8.04 gm/cm^3 as the density of the liquid. Does this work and if so, can anyone clarify why? Thanks**