Physics 0625 · IGCSE · Pressure

Pressure — practice question

A barometer shows $780\,\text{mmHg}$. Mercury has a density of $1.36 \times 10^4\,\text{kg m}^{-3}$. Determine the atmospheric pressure in $\text{N m}^{-2}$?

  • A$1.1 \times 10^4\,\text{N m}^{-2}$
  • B$1.1 \times 10^5\,\text{N m}^{-2}$
  • C$1.1 \times 10^7\,\text{N m}^{-2}$
  • D$1.1 \times 10^8\,\text{N m}^{-2}$

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