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Most small airplanes are not air tight (or even completely encased) because thy do not need pressurization. Commercial planes fly at altitudes where there is not enough oxygen to sustain life, requiring pressurization.
Look in the metric handbook
Building load is calculated by computing the volume of built masses and multiplying by standard weight. Divide it by the area of the surfaces of the masses which are touching the ground.
well you build a bridge and get over it
Calculate the length of steel you are going to use the building and muliply the length with unit weight of the steel.ex: 12 m 25mm steel weight is12 x 3.85 =46.2 kg3.85 kg/m is the unit weight of 25mm bar
what are the sources of pressurization and its components
from squeezing and pressurization
It depends on the building code of your country
nonliving processes of heating and pressurization.
you count them :D
Pressurization keeps the people alive.
psi. pressure per unit of square inches.
how to caculate number lifts
one sqft =m2
If you assume a rectangular building, you measure the length and the width (in feet, in this case), and multiply.
pressurization (and plenty of time)
Heating, pressurization, deformation, recrystallization, and metamorphism.