What happens when a chemical change takes place?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

True or false: the revolution of the earth creates day and night as it rotates around the sun

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?