Find the average rate with which energy is transported along a cord by a mechanical wave of frequency f ff and amplitude A AA , if v v is the speed of the wave and μ μ is the mass per unit length of the cord. Express your answer in terms of the variables f ff , A AA , v vv , μ μmu , and appropriate constants.

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?