Viral meningitis: Meningitis caused by many viruses is usually contagious. However, certain viruses that are transmitted by mosquitoes are usually not spread person to person, so they are not contagious.
3] Heat transfers through the glass by conduction 4] Heat transfers from the glass to the outside air via convection. If the temperature differences are small and there are no winds or drafts, transfer of heat to/from air/glass will be by conduction.
First, the decrease in temperature from 80Â°C to 54Â°C is easy to explain. We have learned in Lesson 1 that heat is transferred between two adjacent objects that are at different temperatures. The test tube and the para-dichlorbenzene are at a higher temperature than the surrounding water of the beaker.