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Radar: A Silent Eye In The Sky
Part I of Essay
Today's society relies heavily on an invention taken for granted: radar.
Just about everybody uses radar, whether they realize it or not. Tens of
thousands of lives rely on the precision and speed of radar to guide their plane
through the skies unscathed. Others just use .... Part II of Essay
.... like an echo. In an echo, a
sound is sent out in all directions. When the sound waves find an object, such
as a cliff face, they will bounce back to the source of the echo. If you count
the number of seconds from when the sound was made to when the sound was heard,
you can figure out the distance the sound had to travel. The formula is:
(S/2) X 1100 = D (Half of the total time times 1100 feet
per second equals the distance from the origin to the reflection point)
Of course, radar is a much more complicated system than just somebod ....
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Words: 948 - Pages: 4
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