Part B Light and sound are two very different phenomena. However, both exhibit wave characteristics, such as frequency. For
sound waves, when the frequency changes, the pitch is affected. Using the diagrams above as a reference, determine
how visible light is affected by changes in frequency.

answer: its c lololo

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate