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Speaker 1: Stuff happens, just don't let it happen to your photos, music,

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Speaker 1: That's m o z y dot com. Welcome to brain

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Speaker 1: Stuff from how Stuff works dot com where smart happens.

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Speaker 1: Hi Am Marshall Brain with today's question, how does a

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Speaker 1: gun silencer work? It's amazing that anything is able to

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Speaker 1: silence a gun, but gun silencers actually work on a

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Speaker 1: very simple principle. Imagine a balloon. If you pop a

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Speaker 1: balloon with a pin, it will make a loud noise.

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Speaker 1: But if you were to untie the end of the balloon,

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Speaker 1: I'll let the air out slowly, it makes very little noise.

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Speaker 1: This is the basic idea behind a gun silencer. To

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Speaker 1: fire a bullet from a gun, gun powder is ignited

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Speaker 1: behind the bullet. The gun powder creates a high pressure

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Speaker 1: pulse of hot gas. The pressure of the gas forces

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Speaker 1: the bullet down the barrel of the gun. When the

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Speaker 1: bullet exits the end of the barrel, it is like

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Speaker 1: uncorking a bottle. The pressure behind the bullet is immense, however,

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Speaker 1: on the order of three thousand pounds per square inch,

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Speaker 1: so the pop that a gun makes as it's uncorked

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Speaker 1: is extremely loud. A silencer screws onto the end of

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Speaker 1: the barrel and has a huge volume compared to the barrel,

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Speaker 1: twenty or thirty times greater. With the silencer in place,

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Speaker 1: the pressure rise gas behind the bullet has a big

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Speaker 1: space to expand into, so the pressure of the hot

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Speaker 1: gas falls significantly. When the bullet finally exits through the

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Speaker 1: hole in the silencer. The pressure being uncorked is much

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Speaker 1: much lower, perhaps sixty p s I. Therefore, the sound

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Speaker 1: of the gun firing is much softer. For moral this

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Speaker 1: and thousands of other topics. Because it how stuff works

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Speaker 1: dot com m protect your photos, music and documents and

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Speaker 1: access to them anywhere with Mosey by e m C,

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Speaker 1: the most trusted name and cloud backup and now save

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Speaker 1: ten percent with promo code brain stuff at mosey dot com.

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Speaker 1: Get started today at m o z y dot com.