Which best describes the purpose of a control sample? to have more quantitative data to analyze at the end of the experiment to have more qualitative data to analyze at the end of the experiment to compare its results to those of a well-known scientist to compare its results to those with the experimental sample

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

How would doubling the made of an object change the objects potential energy