Two forces act on an object. the first force has a magnitude of 15.0 n15.0 n and is oriented 58.0°58.0° counterclockwise from the +x+x ‑axis, whereas the second force has xx ‑ and yy ‑components (−19.0 n,18.5 −19.0 n,18.5 n). express the magnitude and direction of the net force.

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.