1. 20.1 Technology and Communication
By: Shaun Ochab, Kamiren Schwartz, Seth English, and Alex Glydewell

2. Electricity Electricity was developed in 1870.
Electricity grew wildly in the late 1800’s.
Michael Faraday made key discoveries about electricity.
He found that moving a magnet through a wire generated magnetism via electrically charged wires.
Scientists used Faraday’s discoveries to develop the Dynamo.

3. Electricity Cont.
The dynamo transformed mechanical energy into electrical energy.
Edison made a bulb that burned for two days.
Electricity had to be transmitted well to be used.
Waterfalls were used to run dynamos across the nation.

4. Communications Electrical power spurred growth in other inventions.
In 1870 alexander Graham Bell sent the human voice over long distance.
In 1876 the telephone was patented.
In 1894 Guglielmo Marconi developed a way to send messages through space at the speed of light.
In 1880 Hertz proved that such waves existed by transmitting and receiving them.
In 1901 the first wireless message was sent across the Atlantic ocean.

5. The Internal Combustion Engine-Automobile
In the late 1800’s the idea for engines that used a portable fuel supply blew up.
Named for the fact that the combustion of fuel was inside a closed cylinder.
In the old steam engine, combustion took place outside the cylinder.
Important Pioneers included Gottlieb Daimler and Karl Benz of germany and Etienne lenoir of france.
1893, Charles and Frank Duryea built first successful gasoline-driven automobile in united states.
Henry ford produced the first commercially successful automobile.

6. The Internal Combustion Engine-Airplanes
Since the 1700’s, people used balloons filled with gas lighter than air to float above the ground.
Beginning in 1800’s, inventors device heavier-than-air machine that would actually fly.
Wilbur and Orville wright of United states, were the first to succeed in flying a powered plane in sustained, controlled flight. Took place in Kitty Hawk, North Carolina, 1903
Wright brother’s achievement was example of a combination of science and technology.
Wright brother used principles of aerodynamics to succeed.

7. Obj. Review
Obj.1: The development of new sources of power led to technological advances.
Dynamo (Electrical generator)
Long distance communication (Telephones and Telegraphs)
Internal combustion engines
Radio
Vulcanized rubber
Obj. 2: Many inventions improved communication.
Electricity
Hertz discovery of transmission waves
Morse code
Braille typewriter
Telegraph

8. Obj. Review Cont.
Obj. 3: The Internal Combustion Engine has great importance to the improvement of technology.
Improved transportation
Improved standard of living
Made room for finer more complex inventions toward travel

9. The End