Need for the study of refraction of light

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?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

From the perspective of an employee that effective channeling of work related information and concerns