Which two forces act directly on objects that are unable to be viewed by the unaided eye?

Which is likely the most serious problem associated with an epidemic? 1. there are sometimes no cures to the diseases that spread. 2. people often die from the diseases that spread. 3. there are usually no ways to prevent people from getting ill. 4. people often don’t know they have a disease.

Without george washingtons invention, what aspect of life most likely would be impacted

What effect did ww11 have on empires that had been created by european nations