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I move faster in certain solids, but slower in certain gases.

I am typically broken by objects with large masses.

I can be used as for pleasure, practice.

If used excessively, I can cause harm.

What am I?
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You are

sound.

I move faster in certain solids, but slower in certain gases.

Sound moves faster in solids and slower in gases.

I am typically broken by objects with large masses.

The sound barrier can be broken by large aircraft.

I can be used as for pleasure, practice.

Music is pleasing to the ears, and the playing of musical instruments may be practiced.

If used excessively, I can cause harm.

Excessive exposure to loud sound can cause hearing loss.

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  • $\begingroup$ I feel like small masses would be more common for objects breaking this... $\endgroup$ – David Starkey Jun 7 '18 at 15:10

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