Does everything give off some sort of radiation? Example: water, oil, mud, etc. If so, how can it be measured?
Is there a way to translate a radio wave into a frequency in the visible spectrum and see it bounce off a wall?
Can somebody explain how night vision and/or a black light work? I know it does something where it enhances dark colors to an infrared light spectrum. Would the same concept work for object or fluid density? For example, if I was wearing this night vision goggles and see oil on the floor, will...
There is an equation in this standard for a primary outdoor air fraction: Zp=Voz/Vpz (eqn 6-5) which is pretty much a percentage of outside air where Voz is the outside airflow and Vpz is the primary airflow.
But then it shows in table 6-3 in the same standard that the higher the Zp value...
In the ASHRAE fitting database, there are negative duct fitting coefficients. I assume this means that that particular fitting will produce a pressure regain. However, I am unsure that it would be a static regain because:
the formula is P(total)=C*P(velocity), and P(total) only can only drop...
I have a venturi tube and downstream of it, there is a small secondary opening at the end of the throat. This is where the local vacuum is created as the velocity increases and the pressure decreases. This difference between this pressure and the atmospheric pressure will induce air into the...