Aglass column is filled with mercury and inverted in a pool of mercury. the mercury column stabilizes at a height of 735 mm above the pool of mercury. what is the pressure of the atmosphere?

Explanation:

Previous concepts

Atmospheric pressure is defined as "the force per unit area exerted against a surface by the weight of the air above that surface".

Torricelli shows that we can calculate the atmosphric pressure with a glass tube inside of a tank and with the height we can find the pressure with the relation

Solution to the problem

For this case we can use the following conversion factor:

And if we convert the 735 mm Hg to atm we got this:

And also we can convert this value to Pa and Kpa since we have this conversion factor:

And if we apply the conversion we got:

And that correspond to 97.99 Kpa.

Finally we can express the atmospheric pressure on different units for this case :

unbalanced force

explanation:

truck y has a greater velocity than truck x.