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Mechanical waves move energy through a medium by vibrating particles. Mechanical waves can't move energy through a vacuum because there is no matter inside of a vacuum. The three types of mechanical waves are transverse waves, surface waves, and longitudinal waves.
Light will make the object appear “broken” or in an irregular shape.
Refraction is the change in direction of waves.
111.0 because 111.009 rounds off to 111.01, thus rounding again off to 111.0
