Which of the following is most likely to happen when a sound wave reflects off a hard surface? (Assume that neither the source of the sound nor the hard
surface is moving.)
A. A change in speed
B. An echo
C. A change in pitch
D. A beat frequency

The length of a vector arrow represents its magnitude and the point represents its direction true or false apex

Which statements are true about electrolysis? check all that apply. electrolysis requires an acid be present. electrolysis is described by two half-reactions. electrolysis is not an industrial process. electrolysis results in commercially valuable products. electrolysis involves the transfer of electrons. reduction results in the loss of electrons. oxidation results in the loss of electrons.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.