Calculate the average force that must be exerted on a 0.145 kg baseball in order to give it an acceleration of 130 m/s2.

Why don't you see your reflection in water with waves or repples

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?

Are good conductors of heat also good conductors of electricity? explain your answer.