Two children are playing a game in which one of them throws a volleyball up in the air and the other, standing very close to her friend, throws a tennis ball up to hit the volleyball as it reaches its highest point. The first child throws the volleyball at a speed of 14.0 m/s, and the second child throws the tennis ball at a speed of 26.0 m/s. How long after the volleyball is thrown should the second child wait to throw the tennis ball?