You, Archimedes, suspect that the king?s crown is not solid gold but is instead

Question

You, Archimedes, suspect that the king?s crown is not solid gold but is instead gold-plated lead. To test your theory, you weigh the crown, and find it to weigh 60.0 N, and to have an apparent weight of 55.7 N when it is completely submerged in water. Take the density of gold to be 19300 kg/m3, the density of lead to be 11340 kg/m3, and the density of water to be 1000 kg/m3. Also, use g = 9.8 m/s2.

(a) What is the average density of the crown?
Correct: Your answer is correct. kg/m3

(b) What percentage (by weight) of this crown is made of gold? The rest, we assume, is lead.
Incorrect: Your answer is incorrect. %

Explanation / Answer

Question: where did "V1 = 1.41 x 10^-4 m^2" come from?

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