Astring of length 2.83 m and linear mass density 0.500 g/m, and a string of length 3.09 m and linear mass density 0.242 g/m, are tied together and stretched to a tension of 150 n. how long, in seconds, will it take a transverse wave to travel the entire length of the two wires?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?