What energy travels through the air, yet cannot be heard until it vibrates a medium, showing its power through motion?

Category: Science · Difficulty: hard

Hint: It’s what makes music possible.

Answer

Sound waves

Explanation

Sound waves are mechanical waves that require a medium to travel through and become audible when they vibrate that medium.

This is a hard science riddle — a tricky one that takes a little thought. The answer is Sound waves.

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