Sunday, August 29, 2010

Dominic Monaghan on Jimmy Kimmel Live



JimmyKimmelLive | 27.04.2010
The first part of Jimmy's interview with Dominic Monaghan.

If you would like to keep up with all latest Randomnies additions, please subscribe to Randomnies RSSRSS feed or subscribe to Randomnies by Email.

Sunday, August 22, 2010

Thursday, August 19, 2010

Rubens' Tube


The Rubens' tube, also known as the Standing wave flame tube, or simply flame tube, is a physics experiment demonstrating a standing wave. It shows the relationship between sound waves and sound pressure.

Overview

A length of pipe is perforated along the top and sealed at both ends - one seal is attached to a small speaker or frequency generator, the other to a supply of a flammable gas (propane tank). The pipe is filled with the gas, and the gas leaking from the perforations is lit. If a suitable constant frequency is used, a standing wave can form within the tube. When the speaker is turned on, the standing wave will create points with oscillating (higher and lower) pressure and points with constant pressure (pressure nodes) along the tube. Where there is oscillating pressure due to the sound waves, less gas will escape from the perforations in the tube, and the flames will be lower at those points. At the pressure nodes, the flames are higher. At the end of the tube gas molecule velocity is zero and oscillating pressure is maximal, thus low flames are observed. It is possible to determine the wavelength from the flame minima and maxima by simply measuring with a ruler.

Explanation

Since the time averaged pressure is equal at all points of the tube, it is not straightforward to explain the different flame heights. The flame height is proportional to the gas flow as shown in the figure. Based on Bernoulli's principle, the gas flow is proportional to the square root of the pressure difference between the inside and outside of the tube. This is shown in the figure for a tube without standing sound wave. Based on this argument, the flame height depends non-linearly on the local, time-dependent pressure. The time average of the flow is reduced at the points with oscillating pressure and thus flames are lower.
Source



The classic physics experiment involving sound, a tube of propane and fire.
If you would like to keep up with all latest Randomnies additions, please subscribe to Randomnies RSSRSS feed or subscribe to Randomnies by Email.

Eye Macro Photography

“Your beautiful Eyes” photographic series by Suren Manvelyan.



If you would like to keep up with all latest Randomnies additions, please subscribe to Randomnies RSSRSS feed or subscribe to Randomnies by Email.

Monday, August 16, 2010

World’s Most Useless Machine!

It undoes everything you do with it. It is really just a box and a switch. You turn on the machine, and the machine turns itself off. No matter how much you want to turn it on, it will always turn off itself. That’s all it does, but it looks like so much fun.


If you would like to keep up with all latest Randomnies additions, please subscribe to Randomnies RSSRSS feed or subscribe to Randomnies by Email.

Tuesday, August 10, 2010

Tickling Slow Loris


Video by Dmitry Sergeyev



A cute animal called a "slow loris" is depicted holding an umbrella and simply being the most adorable creature you will see all day.  My favorite part is at about 35 seconds in when the umbrella is taken away... the little guy's response will make you go "Awwwww...!"
            cbsnews 

More cute guys
If you would like to keep up with all latest Randomnies additions, please subscribe to Randomnies RSSRSS feed or subscribe to Randomnies by Email.

Subscribe

Related Posts Plugin for WordPress, Blogger...
Word of the Day

Article of the Day

This Day in History

Today's Birthday

In the News

Quote of the Day

Spelling Bee
difficulty level:
score: -
please wait...
 
spell the word:

Match Up
Match each word in the left column with its synonym on the right. When finished, click Answer to see the results. Good luck!

 
Add to The Free Dictionary