What is occurring when a light wave diffracts?
a.)the light wave is bending around an obstacle or through a barrier
b.)the light wave is bouncing off of a smooth surface
c.)the light wave was making a black shirt feel warm
d.)the light wave is bending when it goes from gas to liquid

This chart shows the number of soldiers killed according to two different sources. source a is a book written by university professors. source b is from a well-known historical website. in a paragraph, explain why the data presented is different, and evaluate the reliability of each source. which should be used in a school research project, and why?

There are 25 elements found in living things. how many of these elements are found in some organisms but not all? 1 , 6 , 19 , 25

In a citizens elect the president as head of government separate loy from the legislature