Monique has been laying out on the beach for several hours, without wearing any suntan lotion. After she gets home, she notices that she has sunburn. Please explain how Monique gets the sunburn, using scientific terms. thanks​

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

Explain why electric current cannot exist if a current doesn't have a voltage source.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.