The diagram shows an instrument for measuring atmospheric pressure. The density of mercury is $1.4 \times 10^4\,\text{kg m}^{-3}$. What is the atmospheric pressure?
- A$2.7\,\text{kPa}$
- B$21\,\text{kPa}$
- C$104\,\text{kPa}$
- D$117\,\text{kPa}$
Physics 5054 · O Level · Pressure