0:15:05 > 0:15:09Welcome to Science Fiction - where we take science fact...
0:15:09 > 0:15:13- And blow it to flippin' smithereens. - HE LAUGHS
0:15:13 > 0:15:16Today's question, please, BUD E.
0:15:16 > 0:15:19Just accessing me RAM chip, love. Give us a moment.
0:15:19 > 0:15:25Today's question comes from Marvin in Dungarvan.
0:15:25 > 0:15:28That's a good one. We'll have a craic with this.
0:15:28 > 0:15:31- When you audibly pass wind... - Yeah, or fart.
0:15:31 > 0:15:33When you audibly pass wind
0:15:33 > 0:15:38the vibrations in the air create a sound wave, which travels outwards.
0:15:38 > 0:15:41When vibrations are low, you hear a low pitch.
0:15:41 > 0:15:45- HE FARTS - When they're fast, the pitch's high!
0:15:45 > 0:15:49Sound behaves differently, depending on the material and atmosphere.
0:15:49 > 0:15:54Allow me to demonstrate, and remember, do not try this at home.
0:15:54 > 0:15:57Step one - eat ten cans of beans.
0:15:57 > 0:15:59Step two - wait for half-an-hour.
0:15:59 > 0:16:03Step three - now begin the flatulence test.
0:16:03 > 0:16:07Notice how the sound changes when the professor is in open air,
0:16:07 > 0:16:10underwater...and in space.
0:16:10 > 0:16:14- Because space is a vacuum... - Like almost totally empty, like.
0:16:14 > 0:16:16..we can't hear the sound.
0:16:16 > 0:16:19Oh, but you can still smell it. Oh, no!
0:16:19 > 0:16:23So now you know, Marvin, you can't hear a fart in space.
0:16:23 > 0:16:27That's just a load of old science fiction, huh?
0:16:30 > 0:16:34I'm better off at a window? Whoa, what a whack! Rank!
0:16:34 > 0:16:37SHE COUGHS