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Which one of the statements below is true about mechanical waves? They must travel in empty space. They can travel in a vacuum. Both sound and light are examples of mechanical waves. They require a medium
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Which one of the statements below is true about mechanical waves?

They must travel in empty space.
They can travel in a vacuum.
Both sound and light are examples of mechanical waves.
They require a medium to travel through.

User Daleen
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They require a medium to travel through
User Teo Dragovic
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