On the Moon they would weigh only 200 N. The astronaut's mass is 120kg wherever they are. The weight of an object changes if the strength of gravity changes. Remember: a mass of 1 kg has a weight of about 10 N on Earth.
The droplets in the air may be breathed in by those nearby. Spread can also occur by touching the nose or mouth with droplet contaminated hands. Examples of droplet spread diseases: 1  common cold. 2  flu. 3  meningococcal disease. 4  rubella.
Apart for coughs colds and flu, there are other highly contagious and deadly diseases that can be transmitted through saliva not associated with kissing, but through airborne saliva droplets expelled by an infected person whilst sneezing. The transmission of Hepatitis A, B &C through saliva has been well documented.However, although the HIV virus, which is primarily blood-borne has been found in saliva, there is no evidence to show that the HIV disease has ever been passed through the exchange of saliva.he transmission of Hepatitis A, B &C through saliva has been well documented. However, although the HIV virus, which is primarily blood-borne has been found in saliva, there is no evidence to show that the HIV disease has ever been passed through the exchange of saliva.