What is the longitude at Greenwich, England?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
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Transcribed Image Text:68. Longitude Longitude is the angular distance (expressed in degrees) East or West
Greenwich, England. Arcs of 1° longitude are 110 km apart at the equator, and
of the prime meridian, which goes from the North Pole to the South Pole through
68. Longitude Longitude is the angular distance (expressed in degrees) East or
Greenwich, England. Arcs of 1° longitude are 110 km apart at the equator, ana
therefore 15° arcs subtend 15(110) km, or 1650 km, at the equator.
North Pole
15° W 15° E
|30이w
Equator
1650km
Prime meridian
South Pole
Because Earth rotates 15° per hr, longitude is found by taking the difference
between time zones multiplied by 15°. For example, if it is 12 noon where we are
(in the United States) and 5 P.M. in Greenwich, we are located at longitude 5(15°),
or 75° W.
(a) What is the longitude at Greenwich, England?
(b) Use time zones to determine the longitude where you live.
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