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The Telephone
Beginning of paper
About 100 years ago, Alexander Graham Bell invented by
accident with his assistant Mr. Watson. Over many years, the modern version of
makes the one that Bell invented look like a piece of junk.
Developments in tone dialing, call tracing, music on hold, and electronic
ringers have greatly changed the telephone.
This marvelous invention allows u ....
Middle of paper
....elephone. The waves hit a thin skin called the diaphragm that is physically
connected to a reservoir of carbon granules. When the pressure hits the
diaphragm, it shakes up the carbon granules. Then the carbon expands and
contracts, depending on what force is exerted. At two points on the outer shell
of the reservoir of the carbon are two outlets of.... |
| Word count: 1495 |
Page count: 6 |
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