In laser production the state in which more atoms are in the upper state than in the lower one is calledPhysics A. Metal stable state B. Normal state C. Inverted population D. All the above
Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60km/h and the other is moving at 40km/h mph. In how many hours will they meet?
The most fundamental of all sciences which provides basic principles and fundamental laws to other branches of science is
