11:01am
Cops O: Between a Bush and a Hard Place
11:31am
Cops O: Running in Traffic
12:00pm
Cops O: Too Many Cooks
12:30pm
Cops O: A Man Without a Plan
1:00pm
Cops O: Love Bites
1:30pm
Cops O: Strange Encounters
2:00pm
Cops O: Step Away from the Cutlery
8:30pm
Cops O: Between a Bush and a Hard Place
10:00pm
Cops O: Running in Traffic
10:30pm
Cops O: A Man Without a Plan
11:00pm
Cops O: Love Bites
11:30pm
Cops O: Strange Encounters
12:00am
Cops O: Too Many Cooks
12:30am
Cops O: Step Away from the Cutlery
2:00am
Jail: Las Vegas
2:30am
3:00am
3:30am
9:00am
Gangland: Most Notorious
10:00am
Gangland: To Torture or to Kill?
11:00am
Gangland: Killing Snitches
12:00pm
Gangland: Texas Terror
1:00pm
Gangland: The Death Head
2:00pm
Gangsters: America’s Most Evil : The Pot Princess of Beverly Hills: Lisette Lee
6:00pm
Cops O: Tell It To My Wife

How to Launch a Cork Rocket with an Ultraviolet LED Flashlight

by Justin Meyers at Wonder How To   August 03, 2011 at 7:00PM  |  Views: 654
Science is most marvelous when it's creating an explosion, even at the tiniest of proportions. In the video below, Daniel Rosenberg from Harvard's Natural Science Lecture Demonstration Services reveals the secret to shooting a cork rocket over twenty meters using a little chemistry and an ultraviolet LED light.



Rosenberg, who's a research assistant and lecturer for the Natural Science division at Harvard, demonstrates what happens when hydrogen and chlorine are explosively "burned" together to form hydrogen chloride, initializing the reaction with an ultraviolet light from a miniature LED flashlight.

The hydrogen and chlorine are housed inside a corked quartz test tube held by a three-jaw clamp on a small stand. The ultraviolet light is exposed to the bottom of the corked test tube, initiating the reaction by splitting up chlorine molecules into chlorine atoms so that a free radical chain reaction can take place, which is why the explosion is, as Rosenberg puts it, "such a dang fast reaction." The cork subsequently flies twenty meters across the lecture hall.

The shooting cork is also filmed in slow motion at 480 frames per second at the end of the video, though the image is quite blurry. But it's still a great chemistry experiment to try out at school or in the lab (with the proper precautions, since this is dangerous experiment).

Check out more of Harvard's Natural Science Lecture Demonstrations on YouTube or Facebook.

Article courtesy of Justin Meyers at Wonder How To.

THE DAILY FOUR