Explain how CO2 is able to control fires​

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?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?