There are 2 causes of meningits - viruses and bacteria. Bacterial meningitis tends to be much more dangerous. Viral meningitis is referred to as aseptic meningitis and tends to be more mild. Viral meningitis usually takes 3-7 days to incubate in a person after exposure. At that point they become contagious. They usually stop being contagious after 10 days. Most meningitis is spread through saliva and mucus from the nose.
Heat travels by conduction and radiation in solids and by convection in fluids like air and water. Radiant energy waves travel from the Sun through space and become heat energy when absorbed by a substance or materialâi.e., the Earth.
These molecules then bump into nearby particles and transfer some of their energy to them. This then continues and passes the energy from the hot end down to the colder end of the substance. --. Thermal energy is transferred from hot places to cold places by convection.