In a liquid-in-glass thermometer, a liquid column measures $2.0\,\text{cm}$ in length at $0\,^{\circ}\text{C}$. When the thermometer is heated to $100\,^{\circ}\text{C}$, the column increases in length by $10.0\,\text{cm}$. Starting from P, what is the length of the liquid column at $30\,^{\circ}\text{C}$?
- A$2.3\,\text{cm}$
- B$3.0\,\text{cm}$
- C$5.0\,\text{cm}$
- D$7.0\,\text{cm}$