Which phenomena can be applied to estimate the velocity of star with respect to earthPhysics A. Dopplers effect B. Interference of waves C. Beats phenomena D. All of these
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
