Which statement demonstrates that ultraviolet (UV) rays are electromagnetic waves? A. They require a medium to travel. B. They d
on't require a medium to travel. C. The particles of the medium through which they travel vibrate perpendicularly to the direction of the wave. D. The particles of the medium through which they travel vibrate parallel to the direction of the wave. E. The particles in the medium through which they travel remain stationary.
Probably for the umbilical cord that connects babies (from their early stages in the womb to their removal) to their mothers. The cord is cut, forming the belly button. This is analogous to astronauts in space.
