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.
People also catch the flu by touching surfaces with the virus on them and then touching their eyes, nose or mouth. After exposure to the flu virus, many people begin to experience symptoms within one to seven days. The flu often spreads rapidly within groups, reports MedlinePlus. Once it arrives in a school, students get sick within two to three weeks. A high fever, between 102 and 106 degrees Fahrenheit, is often the first sign of the flu.