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"helium", type: Website
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A brief description of how Helium Balloons float from HowStuffWorks.com, explaining why things float and then extends the argument to helium.
This site includes a short QuickTime movie illustrating bubbles full of helium.
How do we turn hydrogen into helium and make energy? A simple explanation of the nuclear fusion process that goes on in our sun.
A remarkable transition occurs in the properties of liquid helium at the temperature 2.17 K, called the "lambda point" for helium. Part of the liquid becomes a "superfluid", a zero viscosity fluid ...
The most common and inexpensive gas laser is the helium-neon laser and it is usually constructed to operate in the red region of light.
A simple explanation of this party trick.
Kamerlingh Onnes worked for many years to liquify the element which persisted as a gas to the lowest temperature.
The fusion reactions of the CNO Cycle allows bigger stars to convert hydrogen to helium.
A very interesting page on speech that covers the workings of the vocal cords, including how helium affects the voice.
Many of the ideas of quantum mechanics which went into the model of the hydrogen atom can also be used to understand helium, oxygen, copper and iron - in fact all of the elements.
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