Which are examples of stress that are not chronic or persistent?

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

What will a positive and a negative charge do if they are separated from each other?