a barometer... and it is invented by torricelli..
A spirometer is used to measure the amount of air in our lungs.
air pressureair presureAir Pressure
the reason why its difficult is because gases is air and there is not a way to measure air even if you put it in a container some air came out so that's your answer to why its diffcult to measure gases
thermoneter
By the heating the colligion between atoms will increase so the mass of the air also increases.We cant measure the mass of air but we can measure it with the help of a container.
A spirometer is used to measure the amount of air in our lungs.
He would use it to measure air pressure.
barometer
You would use a Spirometer.
Yes, because PV=nRt From this equation it becomes apparent that air pressure, V, can be negative. Since negative temperatures can exist, such as -30C (remember you have to use Celsius and not Fahrenheit). Thus we have negative numbers for air pressure.
I don't know and do not use this website and this answer is the reason why.
You will not measure air in feet or inches because you cant see it.
The SI unit would be degrees Kelvin.
air pressureair presureAir Pressure
No, that would be a hygrometer. An anemometer measures wind speed.
because there is a different amount of air in them.
That would be Humidity that you're looking for.