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.
It takes an average of 10-12 days from exposure to the first symptom, which is usually fever. rash doesn't usually appear until approximately 14 days after exposure, 2-3 days after the fever begins.