Publicado em 8 de março de 2016
This Halloween, we thought we’d investigate the interface between pumpkins and thermite. The results were explosive.
Subscribe for regular science videos: http://bit.ly/RiSubscRibe
It wouldn't be Halloween without some exploding pumpkins. In the top jack-o'-lantern, iron oxide and aluminium powder react to spectacular effect. Once set off by a strip of magnesium, which provides enough heat to get the reaction started, the temperature inside the top pumpkin rises to around 2000 degrees Celsius. At this temperature, the iron melts and is spewed out in a rain of fire, and flows out as a river of molten metal into the poor head below. This is more than enough to set off the gun cotton in the second pumpkin, which bursts into a healthy fireball.
For more Halloween science watch our levitating pumpkin video: https://youtu.be/xFjMznLb9y8
And more spooky explosions: https://youtu.be/jPrjBJt02ek
Subscribe for regular science videos: http://bit.ly/RiSubscRibe
Watch more science videos on the Ri Channel http://richannel.org
The Ri is on Twitter: http://twitter.com/ri_science
and Facebook: http://www.facebook.com/royalinstitution
and Tumblr: http://ri-science.tumblr.com/
Subscribe for the latest science videos: http://richannel.org/newsletter
