Apion has a rest energy of 135 mev. it decays into two gamma ray photons, bursts of electromagnetic radiation that travel at the speed of light. a pion moving through the laboratory at v = 0.98c decays into two gamma ray photons of equal energies, making equal angles θ with the original direction of motion. find the angle θ and the energies of the two gamma ray photons.

Why there is no inductive reactance in dc circuits

Arock collection comes from which part of earth?

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?