density of natural gas there is no one correct starting sea level density of natural gas since natural gas densities vary depending on where the gas was obtained gas from the north sea russia or shale gas will all have different densities typically in the range of 0 7 to 0 9 kg m3
A. It takes approximately 24-48 hours for initial symptoms to appear after exposure to the influenza virus. If you suspect you have the flu, seek medical treatment quickly.
So if you're around somebody who has the flu and the next day you feel pretty good, you're not out of the woods yet. You can actually develop symptoms up to four to five days after being exposed to somebody who has the flu. Next: For How Long Am I Contagious After Being Infected By The Flu?