Question 10 A group of students conduct a lab simulation to compare and contrast characteristics of electromagnetic and mechanical waves. The teacher instructed them to make a list of questions to present to their classmates about the similarities and differences they observe. Which question would be included in the students' list? A When were electromagnetic waves first discovered?   B Does data travel by mechanical waves or electromagnetic waves?   C Do both mechanical and electromagnetic waves need a medium to travel through?   D Can mechanical waves and electromagnetic waves both be illustrated on a graph?

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