Adi1008 wrote:Name wrote:Adi1008 wrote:How far does an air molecule (assume at STP) travel on average before it hits another air molecule, in meters?
I believe that it would be , where is the number density and is the cross sectional area of an air molecule (going to make the rough assumption that diatomic oxygen and nitrogen have relatively similar sizes).
is about (you can calculate this using the Ideal Gas Law if you don't have it memorized). The cross sectional area of diatomic oxygen or nitrogen is about .
Doing the calculation would give a fermi answer of about -7.
Ok thanks! Also oops forgot to set up a question
Lets say you gained the ability to harvest salt from the ocean on a mass scale. If you take the salt and compacted it into a 1 meter radius sphere, what is it's escape velocity