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.
The time between the exposure to the virus and the symptoms to appear is called the incubation period. The normal incubation period for flu is about 3-5 days. After the incubation period, you start displaying symptoms and excreting enough viruses to infect people around you. It will start with a mild headache, but the next day, you will have a few aches with a low fever. It will turn into a high fever on the third day with a runny nose.