Basics Of Sound
28 Feb 2008Inside your ear is a very thin piece of skin called the eardrum. When your eardrum vibrat
es, your brain interprets the vibrations as sound -- that's how you hear. Rapid changes in air pressure are the...
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How The Stocks And Stock Market Work
20 Feb 2008The stock market appears in the news every day. You hear about it any time it reaches a n
ew high or a new low, and you also hear about it daily in statements like "The Dow Jones Industrial Average ros...
- 100
speeches
How Does Reverse Osmosis Work ?
16 Feb 2008To understand "reverse osmosis," it is probably best to start with normal osmosis. Accord
ing to Merriam-Webster's Collegiate Dictionary, osmosis is the "movement of a solvent through a semipermeable m...
- 109
speeches
How Satellite Radio Works
09 Feb 2008We all have our favorite radio stations that we preset into our car radios, flipping be
tween them as we drive to and from work, on errands and around town. But when you travel too far away from th...
- 103
speeches
How Solar Cells Work
09 Feb 2008You've probably seen calculators that have solar cells -- calculators that never need bat
teries, and in some cases don't even have an off button. As long as you have enough light, they seem to work fo...
- 103
general-articles
The Work Of A Fuse
04 Feb 2008The main job of the fuse is to protect the wiring. Fuses should be sized and located to p
rotect the wire they are connected to. If a device like your car radio suddenly draws enough current to blow th...
- 36
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