Wavelength is measurable in . A. Electromagnetic waves only
B. Mechanical waves only
C. Both electromagnetic and mechanical waves
D. Neither electromagnetic nor mechanical waves.

C. Both electromagnetic and mechanical waves

Explanation:

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answer: intercourse

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this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.