2-4
three.
i guessed 8 seconds
3
3
It is more like car length than seconds when following another car. You should be at least 2 car lengths from the other car.
A minimum of 2 seconds in good weather.
it doesn't matter how many seconds you should wash your hand, but that you wash them thorougly
15 seconds
How many car lenghts does your car have to be when you are stopped at a red light? a minimum of 2 seconds behind the car in front
6m
About every 10 to 20 seconds
It depends on the model. I really don't know how many do and how many do not. Every one I've worked with in my positions as laundry attendant have done it.