Which of these waves has the greatest frequency?

you!

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?

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Ascientific blank must be testable and capable of being proven false?