The reference point in motion is:
A. the point in space and time at which the motion ended.
B. the focal point.
C. the point in space and time at which the motion began.
D. the origin.

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

it takes on an electronical energy

the correct answer to this question is 2