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.
Key Points. 1  Airborne transmission results in the inhalation of pathogens that can affect an individual's respiratory system or the rest of the body. 2  Airborne diseases are caused by pathogens which can ride on either dust particles or small respiratory droplets that can stay suspended in the air and travel distances on air currents.