Question 2 of 10 Which statement best describes a surface wave?
A. It forms when electric and magnetic fields vibrate perpendicularly
to each other.
B. It occurs at the boundary of two different mediums, such as air
and water
C. It forms when matter vibrates in a direction that is perpendicular
to the direction of the motion of the wave.
D. It forms when matter vibrates in a direction that is parallel to the
direction of the motion of the wave.
SUBMIT

the answer is 100% density i've answered this question before and done the quiz myself.

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.

i think the answer is a.keratin is the pigment responsible for skin color.