Published
Day 12 of BBC Worldwide's Interactive advent calendar - click here to see what other festive treats we have for you https://www.youtube.com/watch?v=YyjhcWDRnyM&list=PLO-wxIy9sHyYhRFlZR9n4EGQW1jBO05uR&index=1 Here is the first science explanation behind Greg Foot and Mike Sansom's '12 Explosions of Christmas'.
At the top of the list is 12 mince pies a'popping -- well we should say EXPLODING with flash powder!
All any explosion needs are the three elements of the fire triangle, a fuel, oxygen and heat. In this explosion there's plenty of all three.
Using a fuse made from string covered in black powder, leading to a trail of loose black powder, Greg and Mike set off a series of 12 mince pies each with 0.2g of flash powder in them.
Both black powder and flash powder contain fuel and oxygen which means they burn when lit with a flame, producing hot expanding gases. But what's the difference between black powder and flash powder? Flash powder burns quicker out of the two, producing even more hot expanding gases. Charles' law (a gas law) states that when the temperature of a gas increases, its volume also expands. So when the flash powder is confined (say for example, in a mince pie!) it creates gases that heat up quickly and need more room which makes the mince pies POP.
There are still 11 more videos to go until Christmas, so make sure you hit SUBSCRIBE so they appear in your YouTube home feed when you log in.
Subscribe to Head Squeeze: http://www.youtube.com/subscription_center?add_user=HeadsqueezeTV
Check out Greg and Mike's '12 Explosions of Christmas' bonanza here:
Tell us what you think of Greg & Mike's '12 Explosions of Christmas', use #12ExplosionsofXmas on G+ and Twitter.
Follow Greg Foot for more science daredevil mayhem: https://twitter.com/gregfoot
Follow Mike Sansom for all your firework needs: https://twitter.com/brightfirepyro
http://www.youtube.com/user/HeadsqueezeTV
http://www.youtube.com/subscription_center?add_user=HeadsqueezeTV
At the top of the list is 12 mince pies a'popping -- well we should say EXPLODING with flash powder!
All any explosion needs are the three elements of the fire triangle, a fuel, oxygen and heat. In this explosion there's plenty of all three.
Using a fuse made from string covered in black powder, leading to a trail of loose black powder, Greg and Mike set off a series of 12 mince pies each with 0.2g of flash powder in them.
Both black powder and flash powder contain fuel and oxygen which means they burn when lit with a flame, producing hot expanding gases. But what's the difference between black powder and flash powder? Flash powder burns quicker out of the two, producing even more hot expanding gases. Charles' law (a gas law) states that when the temperature of a gas increases, its volume also expands. So when the flash powder is confined (say for example, in a mince pie!) it creates gases that heat up quickly and need more room which makes the mince pies POP.
There are still 11 more videos to go until Christmas, so make sure you hit SUBSCRIBE so they appear in your YouTube home feed when you log in.
Subscribe to Head Squeeze: http://www.youtube.com/subscription_center?add_user=HeadsqueezeTV
Check out Greg and Mike's '12 Explosions of Christmas' bonanza here:
Tell us what you think of Greg & Mike's '12 Explosions of Christmas', use #12ExplosionsofXmas on G+ and Twitter.
Follow Greg Foot for more science daredevil mayhem: https://twitter.com/gregfoot
Follow Mike Sansom for all your firework needs: https://twitter.com/brightfirepyro
http://www.youtube.com/user/HeadsqueezeTV
http://www.youtube.com/subscription_center?add_user=HeadsqueezeTV
- Kategorien
- Unterhaltung
Du musst Dich Anmelden oder Registrieren, um einen Kommentar zu schreiben.
Schreib als Erster einen Kommentar zu diesem Video
Als nächstes
Autoplay
-
02:52
7 bags of chestnuts roasted by flame cannons | 12 Explosions of Christmas with Greg Foot | HS
-
02:28
Why do we get car sick? | Greg Foot | Head Squeeze
-
06:19
Why do we get headaches? | Greg Foot | Ask Head Squeeze
-
02:53
11 Baubles Blazing with Molten Iron | 12 Explosions of Christmas with Greg Foot | Head Squeeze
-
02:23
Why do jellyfish sting? | Greg Foot | Head Squeeze
-
02:09
8 Brussels Sprouts Cannon balls | 12 Explosions of Christmas with Greg Foot | Head Squeeze
-
03:58
2 melting snowmen with fire | 12 Explosions of Christmas with Greg Foot | Head Squeeze
-
02:17
5 Hydrox Santas Bursting! | 12 Explosions of Christmas with Greg Foot | Head Squeeze
-
05:39
What are armpits for? | Greg Foot | Ask Head Squeeze
-
02:25
12 Explosions of Christmas with Greg Foot | Playlist Introduction | Head Squeeze
-
05:30
Why do we laugh when we're tickled | Greg Foot | Ask Head Squeeze
-
02:53
10 Stockings Spontaneously Combusting in SLOW MO | 12 Explosions of Christmas with Greg Foot | HS
-
02:03
What are Goosebumps? | Greg Foot | Head Squeeze
-
02:34
What happens if I swallow chewing gum? | Greg Foot | Head Squeeze
-
02:51
3 high explosive crackers in SLOW MO | 12 Explosions of Christmas with Greg Foot | Head Squeeze
-
02:11
Why do we have eyebrows? I Greg Foot I Head Squeeze
-
02:35
Why do you get a fever? I Greg Foot I Head Squeeze
-
03:58
12 Explosions of Christmas with Greg Foot | Head Squeeze
-
02:43
An epic firework tree with pyros! | 12 Explosions of Christmas with Greg Foot | Head Squeeze
-
01:57
4 coloured flaming puddings | 12 Explosions of Christmas with Greg Foot | Head Squeeze
-
03:04
6 Christmas presents exploding with liquid nitrogen | 12 Explosions of Christmas with Greg Foot | HS
-
03:03
9 Reindeers A'Rocketing | 12 Explosions of Christmas with Greg Foot | Head Squeeze
Lade...