Physics Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________? Options:A. Dopplers effectB. Interference of wavesC. Beats phenomenaD. All of theseView AnswerA. Dopplers effect Continue Reading Previous: A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?Next: Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?