Electromagnetic waves travel in free space with the speed ofPhysics A. λ-rays B. Positive rays C. Cathode rays D. More than sound waves
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
