What is the product of the first beta decay in this series? a) ac-227 b) ac-228 c) ra-227 d) rn-224

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

Can someone me with questions 15 to 17 plz.

Adepositional also feature that forms where a stream enters a lake or an ocean is a