Gold has a density of $19\,\text{g cm}^{-3}$. A gold coin has a thickness of $2.0\,\text{mm}$. The area of each face of the coin is $4.5\,\text{cm}^2$. What is the coin's mass?
- A$2.1\,\text{g}$
- B$17\,\text{g}$
- C$21\,\text{g}$
- D$170\,\text{g}$
Physics 5054 · O Level · Density