Helium

How many balloons would it take to lift a House ? Between 100,000 and 23.5 million. So , it takes 1 cubic foot of helium can lift 0.067 pounds, it would take 1,492,537 cubic feet of helium to lift the house or about as much as would be contained in 105,854 balloons, each 3 feet in diameter.

Some facts about Helium How helium works :

http://www.youtube.com/watch?v=Rq1JizRQvDY • Helium changes your voice and makes it more

high pitched . • Helium is a special type of gas that’s very

useful to people! It’s the stuff used to fill up balloons and blimps that float in the air. It makes things float because it’s super light!

• Helium isn’t too common on Earth, though lots of it can be found in parts of the United States where natural gas is found in the ground. It’s much more common in the whole Universe! About 25% of our Sun is made of helium!

Why Does Helium changes your voice ?

• Helium is significantly less dense than air. As a result, the speed of sound is much higher in helium. By inhaling helium you are effectively increasing the speed of the sound of your voice. The configuration of your vocal tract does not change, however. If you increase the speed of a sound while keeping its wavelength constant, you increase the frequency of that sound. (Think of it as a sort of Doppler effect.) Since each element of speech is composed of a pattern of several frequencies, altering the speed of sound distorts that pattern. Result: you sound like Donald Duck.

Why does Helium escape Faster than Air From a balloon ?

• Helium escapes from sealed rubber balloons very much faster than air does. This is because the rubber membrane of a typical toy balloon possesses many small holes or pores, of sizes ranging from smaller than that of a helium atom, to holes thousands of times larger to clearly see with. Helium , being the second-smallest atom (next to Hydrogen), passes through many more of these holes than Nitrogen , the principal constituent of air and which has an atomic radius many times larger than He. There are other effects at work besides atomic size, but atomic size alone will explain most of the faster deflation seen in He balloons, compared with balloons filled with room air.

Symbol for Helium :

The symbol for Helium

is : He

Thank You for watching c:

By Brianna & Jodie