Con el hilo y los tres ladrillos auxilate para materializar la trayectoria seguida como se ilustra en la figura 4.47. la longuitud de la trayectoria recorrida se conoce como distancia. en este caso la distancia recorrida tiene una longuitud de:

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.