Can y’all press my profile and answer the questions please? I will give you brainliest

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years