What is the frequency of an event?

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 a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation