The cooling system of a refrigerator extracts heat at a rate of 0.7kjs-1 . How long will it take to convert 500g of water at 20°C into ice

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

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 using the scientist method, which step comes last?