Which of the following best describes alternating current? A. current that constantly turns on and off

B. current in which charges change direction

C. current that gains and loses electrons

D. current that increases and decreases in temperature

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space