what units are commonly used to measure airpressure how does increasing the density of gas affect its pressure how does increasing the density of gas affect its pressure what units are commonly used to measure air pressure
The SI unit is the pascal (air pressure is about 100,000 pascal). Other units include the Bar ("standard air pressure", which approx. = that 100 kPa ), and the torr, which is approximately equal to millimetres Hg but used for measuring vacua. Air pressure is about 760 torr.
No, milliliters are used to measure volume, not air pressure or any other kind of pressure. A barometer is what is used to measure air pressure in your home, your office, in a weather station, etc. A pressure guage is a tool used to measure the air pressure in a car tire.
If you're asking about a tool to measure the air pressure in a car tire, that is called a pressure guage. If you're asking about a scientific instrument to measure atmospheric air pressure, it is called a barometer.