# The atmospheric pressure on top of Mt. Everest (elevation 29.028 ft) is 250. mmHg. What is the atmospheric pressure in atm and torr?

Jun 12, 2017

It's so low?

#### Explanation:

Well, we know that $\text{1 atmosphere}$ or pressure will support a column of mercury that is $760 \cdot m m$ high. A mercury column is thus a very convenient means to measure LOW pressures (such as occur on a vacuum line) or pressures around about $1 \cdot a t m$.

And thus we can take the quotient...........

$\text{Pressure"_"atop Everest} = \frac{250 \cdot m m \cdot H g}{760 \cdot m m \cdot H g \cdot a t {m}^{-} 1} = 0.329 \cdot a t m$.

And no wonder they usually take bottled oxygen. It must be also hard to get a hot meal in the Himalayas. The boiling point of water under these conditions is round about $70$ ""^@C.

Of course, the pressure in $\text{Torr}$ is the same as the pressure in $m m \cdot H g$.