You suspend the coin from a spring scale and find that its mass is 49.7 g. You then let the coin hang completely submerged in a glass of water but not touching the bottom and find that the scale reads 47.1 g. Should you get excited about the possibility that this coin might really be gold? Explain.

While vacationing on the Outer Banks of North Carolina, you find an old coin that looks like it is made of gold. You know that there were many shipwrecks here, so you take the coin home to test it.