What two factors will most likely change the speed of a mechanical wave?
amplitude and wavelength
frequency and amplitude
period and wavelength
period and amplitude

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?

What are chlorofluorocarbons and what impact do they have on the atmosphere?

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d