Amanometer that is filled with water (rho=1000 kg/m3) is connected to a wind tunnel to measure the pressure inside the test section. the other manometer is open to the atmosphere and the atmospheric pressure is 100 kpa. the difference in the manometer level is 100 mm. determine the absolute pressure in the test section in kpa.

To develop this problem it is necessary to apply the concepts performed to the absolute pressure based on the reference pressure (atmospheric) and the pressure that is generated due to the height of the column of the measured liquid.

In mathematical terms the previous concept can be expressed as

Where

Atmospheric Pressure

Density

g = Gravitational acceleration

h = Height

Our values are given as

g = 9.8m/s

Replacing we have then that

Therefore the absolute pressure in the test section is 99.9019kPa

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force