What is the difference between an energy source and an energy resource?

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

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?