Why is the solar cycle said to have a period of 22 years, even though the sunspot cycle is only 11 years long?

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?

When does your body conduct current more readily?

Anybody wanna ? (picture included? )