what is the efficiency of a gasoline-electric hybrid that combines 184 KJ of mechanical energy and 356 KJ of sound and heat energy the energy input was 540KJ​

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?